Cory cats Glass Surfing Always!! Help!

HI all, so I have four albino corys and I'm in loveee the with them. But we’ve had them for over month now and they still glass surf all time, one or two of them are down there periodically and everyone does but not nearly as much as they should? Anyone have an idea why? My water parameters are good, I have lots of hiding spots and live plants. Tankmates include two female platys and two bolivian rams. Everyone eats perfectly fine in fact once dinner rolls around the corys stay down at the bottom usually for the rest of the night. Plz help!! Why are my corys so crazy during the day!!

 

Hello
Occasional glass surfing isn’t anything to worry about. There are even some instances where pacing the glass is normal and expected, such as when a fish is new to its environment, after your perform a water change or other major tank maintenance, or when people are standing near the tank and the fish may expect food.
Is your water perimeters good like you said, Is your tank has appropriate size and not overstocked, Is your schooling fish seem happy and are kept in the appropriate numbers and there are no aggressive fish in the tank.

 

What are the numbers for your parameters? Tank temperatures? Size of tank? Type of substrate?

 

What are the numbers for your parameters? Tank temperatures? Size of tank? Type of substrate?

I have a 20 gallon reg with sand. Last water test I had 0ppm ammonia, 0 nitrite, and about 15-20ppm nitrates, Ph at 7.0. Temp fluctuates a bit between 74-78,pretty sure its broken but I'm not sure. Getting a new fluval heater today. I have a 50 gal aquaclear filter and everyone is still pretty juvenile still!

Hello
Occasional glass surfing isn’t anything to worry about. There are even some instances where pacing the glass is normal and expected, such as when a fish is new to its environment, after your perform a water change or other major tank maintenance, or when people are standing near the tank and the fish may expect food.
Is your water perimeters good like you said, Is your tank has appropriate size and not overstocked, Is your schooling fish seem happy and are kept in the appropriate numbers and there are no aggressive fish in the tank.

None of my other fish bother the corys whatsoever, I don't think I'm overstocked I only have a total of eight in there everyone has places to hide if they need.

 

None of my other fish bother the corys whatsoever, I don't think I'm overstocked I only have a total of eight in there everyone has places to hide if they need.

So how many Corycats do you have

 

So how many Corycats do you have

4
Might get a couple more julI corys but not sure

 

4

You could add one more as is recommended school of 5 Cories for 20 gallons is recommended. They also love water flow and are often found “dancing” in areas with high flow. That said, try to have a few spots in your tank with low water flow so your Cories can rest. something like this will keep them happy

 

You could add one more as is recommended school of 5 Cories for 20 gallons is recommended. They also love water flow and are often found “dancing” in areas with high flow. That said, try to have a few spots in your tank with low water flow so your Cories can rest. something like this will keep them happy

Okay will do! Thansk so much

 

HI all, so I have four albino corys and I'm in loveee the with them. But we’ve had them for over month now and they still glass surf all time, one or two of them are down there periodically and everyone does but not nearly as much as they should? Anyone have an idea why? My water parameters are good, I have lots of hiding spots and live plants. Tankmates include two female platys and two bolivian rams. Everyone eats perfectly fine in fact once dinner rolls around the corys stay down at the bottom usually for the rest of the night. Plz help!! Why are my corys so crazy during the day!!

Ive always had corys and theyve always glass surf when they feel like it and there's never been any problem with them so id say theyre fine

 

Might get a couple more julI corys but not sure

All the Cories should be the same kind. So you'll want another Albino.

 

I have a mix of 2julli, 2 spotted and 3 jade Cory's I've inherited/rescued from people who had to move or had aggressive fish picking on them (lack of research).... they seem to get along well and tend to forage in mixed groups happily. While I'm sure buying them its recommended to keep similar types but I know lfs don't always keep the same in stock. I'm still keeping an eye out for more to rescue as I have a big tank.

 

I wouldn't worry about it at all. Cories are very active fish with crazy personalities. They simply don't tire out. Mine glass surf on a daily basis, and they are in a 60g.

If they glass surfing in pairs/groups my guess is they are laying eggs. Especially if you did a WC recently. The glass surfing is the female looking for a good spot to lay the eggs, and the male chasing the female in the hope of being chosen to mate for the next batch. Your other fish (and even the cories) will love snacking on the eggs though, so you will only see them immediately after the cory lays them.

 

My corys do that to prep for egg laying... Can you get two more to make 6, the more there are the happier they will be

 

I upgraded my tank yesterday, and today some of my bronze cories are glass surfing. Is glass surfing a sign of stress in cories? What does it mean?

 

Small schools may cause stress. A general rule would be to stock at least 6 Corydoras whenever possible, and ensuring they are the same species. For example, stocking 6 Panda Cory’s, not 2 Pygmy Corys, 2 Sterbai Corys and 2 Julli Corys eat

 

Small schools may cause stress. A general rule would be to stock at least 6 Corydoras whenever possible, and ensuring they are the same species. For example, stocking 6 Panda Cory’s, not 2 Pygmy Corys, 2 Sterbai Corys and 2 Julli Corys eat

I have 10 bronze cories. Not all of them are glass surfing

 

You could check your water parameters just in case you kicked up a lot of gunk from the substrate. But I've had cories for 10 years and they surf the glass all the time.

 

Your water looks cloudy, maybe because of this?

 

Your water looks cloudy, maybe because of this?

It’s from the substrate. Like I said, I just set up this tank with seeded media. But I’m about to test the water, I’ll give you the parameters

 

Parameters should help

 

If it isn't excessive I think its fine. Honestly some may disagree but if I had corydoras who never glass surfed I would be surprised. IMO appropriate corydoras numbers depend on the species and what species are kept together.

 

Ammonia: 0
Nitrite: 0
Nitrate: 5
pH: 6.2

 

It’s from the substrate. Like I said, I just set up this tank with seeded media. But I’m about to test the water, I’ll give you the parameters

Random thought while you're checking the parameters. If they came from a smaller tank, they might just be enjoying the extra space too. I recently moved from a 50g to a 125g and all of my cories are going nuts glass surfing and riding the new flow. The other day one kept swimming up to the output and letting it blast it around the tank. Of course whenever I got my phone to record, it would stop.

Ammonia: 0
Nitrite: 0
Nitrate: 5
pH: 6.2

They're probably just being corydoras.

 

Random thought while you're checking the parameters. If they came from a smaller tank, they might just be enjoying the extra space too. I recently moved from a 50g to a 125g and all of my cories are going nuts glass surfing and riding the new flow. The other day one kept swimming up to the output and letting it blast it around the tank. Of course whenever I got my phone to record, it would stop.

It is from a smaller tank. They went from a 29 to a 45. That’s a happy thought

 

It is from a smaller tank. They went from a 29 to a 45. That’s a happy thought

Sounds like they're going to enjoy their new home. Still might check the water parameters occasionally the next few days since it's newly setup. You're probably fine though as I just did the same thing and didn't experience a mini cycle the first week.

 

Simply adapting to new surroundings and maybeeeeeeee pre spawning behaviour.

 

my pygmy cories do this twice a day every day! when the room lights up before the tank lights go on, and just after its dark for the night. i love cories.

 

Simply adapting to new surroundings and maybeeeeeeee pre spawning behaviour.

Hmm, maybe. My cories have spawned before I’m not sure they’d lay eggs the day after they’re thrown into a new tank though... You’re probably right that they’re just adapting

 

Random thought while you're checking the parameters. If they came from a smaller tank, they might just be enjoying the extra space too. I recently moved from a 50g to a 125g and all of my cories are going nuts glass surfing and riding the new flow. The other day one kept swimming up to the output and letting it blast it around the tank. Of course whenever I got my phone to record, it would stop.

That’s awesome! Nothin like seeing your fish having fun!

 

I've got bronze corys for a week now. 3 albino and 2 regular and they do this sometimes, it was a nice read through this thread. I noticed mine do this when I just change the water, they glass surf and try to get up to the inflow pipe, they enjoy their new water Also, they do this when they are hungry from what I've observed.

I'm going to have to read up on spawning, I only know about the T formation. Also, do any of you know whether albino and the regular bronze cories would mate together? They are the same species after all.

 

My khuli loaches do they same thing. They are just sitting together eating or sleeping and then BAM one of them goes crazy and frantically swims around the tank in circles and glass surfs and goes to my spray bar to get blasted around. They are weird. I have 10.

 

I'm going to have to read up on spawning, I only know about the T formation. Also, do any of you know whether albino and the regular bronze cories would mate together? They are the same species after all.

Actually there are several different species of albino corys. One of them being the bronze Cory . I’m not sure if they’ll mate together but I think that if they did it would be interesting to see what the fry look like.

 

Actually there are several different species of albino corys. One of them being the bronze Cory . I’m not sure if they’ll mate together but I think that if they did it would be interesting to see what the fry look like.

Oops, didn't know that. The store I bought from only had albino bronze cories. I'm not so sure about them breeding because the albinos mostly stick together and the regulars stick together even though they swim together as a group of 5 some times.

 

Oops, didn't know that. The store I bought from only had albino bronze cories. I'm not so sure about them breeding because the albinos mostly stick together and the regulars stick together even though they swim together as a group of 5 some times.

I think its possible but it depends if the corys are willing to breed together. Even if it’s genetically possible that doesn’t mean the Corys will do it.

 

I think its possible but it depends if the corys are willing to breed together. Even if it’s genetically possible that doesn’t mean the Corys will do it.

Exactly. It is genetically possible for sure. I should have bought 5 albinos instead of mixing it up. But, let's see what happens.

 

As far as I know, albino and "normal" bronze corydoras can/are able to definitely mate together. I think I know a member here whos bronze and albino bronze corydoras bred together.

 

As far as I know, albino and "normal" bronze corydoras can definitely mate together. I think I know a member here whos bronze and albino bronze corydoras bred together.

That would be cool. Thanks for the info.

 

I've got bronze corys for a week now. 3 albino and 2 regular and they do this sometimes, it was a nice read through this thread. I noticed mine do this when I just change the water, they glass surf and try to get up to the inflow pipe, they enjoy their new water Also, they do this when they are hungry from what I've observed.

I'm going to have to read up on spawning, I only know about the T formation. Also, do any of you know whether albino and the regular bronze cories would mate together? They are the same species after all.

I have an albino female and bronze male who spawned

Edit: because albinism is a recessive gene, all of my fry are bronze. But, they still do have the gene, it just isn’t showing. This means that if I were to breed one with another albino, half of the batch would be albino and the other half would be bronze.

 

I have an albino female and bronze male who spawned

Awesome. They look good

 

Hmm, maybe. My cories have spawned before I’m not sure they’d lay eggs the day after they’re thrown into a new tank though... You’re probably right that they’re just adapting

They definitely can / will.

I've got bronze corys for a week now. 3 albino and 2 regular and they do this sometimes, it was a nice read through this thread. I noticed mine do this when I just change the water, they glass surf and try to get up to the inflow pipe, they enjoy their new water Also, they do this when they are hungry from what I've observed.

I'm going to have to read up on spawning, I only know about the T formation. Also, do any of you know whether albino and the regular bronze cories would mate together? They are the same species after all.

Yes if they're both C.aeneus.