What's best for corys and guppies?

houiej

Member
I'm thinking of getting 3-4 panda cory cats and I'm wondering what's the best substrate for them? Would pebbles or sand be better?
 

Nutter

Member
Sand is better, no contest. Gravel will do so long as it is small & rounded. Large gravel or gravel with rough or sharp edges will damage the Cories barbels.
 

Kunsthure

Member
I agree with Nutter, definitely sand. I started out with gravel and all my cories did all day was swim up and down the side of the tank. I switched to sand and they now spend most of their time sifting through the sand looking for food.

I think smooth, small river pebbles would be ok but not nearly as good as sand.

-Lisa
 
  • Thread Starter

houiej

Member
What if I was going to keep them in my quarantine tank for 2-3 weeks before introducing them to my main tank but my QT does not have substrate? Would that affect the corys?
 

Nutter

Member
Your Cories would be fine in a bare bottom QT tank. Like any fish in QT they won't be all that happy but that's because of the bare tank rather than the lack of any substrate.
 

iFoundNemo

Member
I am completely 100% for pebbles. Like the kind you buy in the bags at Petsmart. They are amazing and have tons of colors. I have two albino corys and 3 guppies. The guppies aren't very particular, but my cory's love it! The cory's suck up a lot of sand when they clean the bottom making there digestive system a little screwy, haha. But the pebbles allow them to suck up the food easier between the cracks
 

Aquagirl1978

Member
I have small smooth pebbles, River pebble at the LFS. My emerald corys love it and they swim so smoothly over the pebbles and suck up the food in between. I used sand one time with a pleco when I had one of my first bettas and he sucked in so much sand I could see divids in it. I am a definite advocate for smooth pebbles for the corys.
 

Nutter

Member
Cories live over sand in their natural environment. If you watch them carefully you will see most of the sand actually gets filtered back out through their gills. This is their natural way of finding food. The little bit of sand that is digested actually helps with the digestion processes. Sand that is aquarium safe & not so large that the fish can't poo it back out again never has & never will cause digestive problems withing any fish.
 
  • Thread Starter

houiej

Member
okay noted. I'll go with sand if that's the case for their natural habitat. I'm drawn towards darker coloured sand though.. Does that matter to the cories? Any idea if darker coloured sand is coarser or finer than light coloured sand?
 
  • Thread Starter

houiej

Member
Chanced across this article, relevant to this thread and thought I'd post it because it answers my questions.



So based on this article, I will be looking for a fine light-coloured sand for my corydoras.
 

Cory-crazy

Member
I would go for sand everytime,has nutter said,cories sift sand through their gills,plus in between pebbles had harbour bacteria which if not cleaned regularly through vacuuming can lead to corys possibly getting bacterial infections.
My sand is kids play sand bought from argos in the uk
 

Nutter

Member
I'd agree with the information in that article except the not using black substrate bit. Most Fishlore members use Pool Filter Sand in their tanks with a sand substrate. It's cheap, readily available & is'nt pure white. Playsand is acceptable so long as the grains are rounded rather than jagged but it's often pure white which coesn't look the greatest IMO. Eco-Complete or Flourite Sand are good for Cories. They are specific substrates for a planted aquarium & cost considerably more than most other substrate materials. They are both black but I've never heard of black being bad to have with Cories. They seem to like black just as much as any other colour. There is moonsand (I think that's what it's called) that is also very dark but I've never used it so I can't make recommendations about it.
 

mosin360

Member
I use pea gravel from Lowes. No issues.

And sand is just one of their natural habitats. They are also found in gravel and detritus.
 

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