Fishless cycle - Page 2

Greener099

Good Morning, I've been doing my fishless cycle now since 3/6/21 and my ammonia has never dropped to zero in this time, and for the last few day it's been 2ppm on every rest, I've got 0 Nitrite and 5.0 Nitrate showing, I've got a Juwel190 tank with the built in Bioflow filter which consists of bioPad, bicarb, Nitrax, bioPlus coarse and bioPlus Fine, would any of these slow the process down? My results since the 3/6/21 are attached below, every time ammonia dropped below 4 I readded and now reading up to 2ppm but it never drops to zero over a 24HR period. Thanks.
 

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Greener099

No need to do water changes every few days. I suspect the one 50% water change will get things moving forward. Yes, get it back up to 2ppm each time it gets down to or close to zero.

The cyanobacteria was possibly eating up the minerals even faster than the cycling process was. Now that it is gone and once the minerals are replenished with the water change things should start moving forward quickly.
If I do a 50% change do you think I would need to do another one after that?
 
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mattgirl

If I do a 50% change do you think I would need to do another one after that?
Probably not until the cycle is complete. The numbers will answer that question for us. Of course once you get fish in this tank they will need to be done often. I recommend weekly water changes to keep the water fresh and clean for your fish.
 
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Greener099

Fingers crossed won't be long now, as my 3 kids are desperate to get their new fish
 
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Greener099

So today was the day I finally had 0 ammonia, 0 Nitrite, 20 Nitrate
 
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Greener099

4 days in a row now, I've had 0 ammonia, 0 Nitrite and 20 Nitrate, does this mean my tank finally looks like it might be cycled?
 
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mattgirl

4 days in a row now, I've had 0 ammonia, 0 Nitrite and 20 Nitrate, does this mean my tank finally looks like it might be cycled?
Yay, if you have been adding ammonia and are getting these readings 4 days in a row then yes this cycle is done. If it has been a couple of weeks since you changed any water go ahead and change out at least half of it before putting fish in there.
 
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Greener099

We have added our first lot of fish, now have 3 very happy and excited children, is it safe to add our 3 guppies and 1 molly into the new tank with the new fish as only want to use the one tank.
 
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mattgirl

We have added our first lot of fish, now have 3 very happy and excited children, is it safe to add our 3 guppies and 1 molly into the new tank with the new fish as only want to use the one tank.
Are you telling me you already had a cycled tank? Had I known that my advice would have been different and I could have saved you from having to wait so long to add fish to this tank. You could have simply moved the cycle from one tank to another. That is the benefit of having a cycled tank. You never have to go through the long drawn out cycling process again. I only mention this in case you eventually upgrade the tank again you can move this cycle over to another tank.

To answer your question though. If this tank has been processing at least 2ppm ammonia then yes, it will be safe to move the other fish over to this tank. It is a good idea to keep an eye on the parameters for a couple of weeks to make sure all is stable.
 
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Greener099

Are you telling me you already had a cycled tank? Had I known that my advice would have been different and I could have saved you from having to wait so long to add fish to this tank. You could have simply moved the cycle from one tank to another. That is the benefit of having a cycled tank. You never have to go through the long drawn out cycling process again. I only mention this in case you eventually upgrade the tank again you can move this cycle over to another tank.

To answer your question though. If this tank has been processing at least 2ppm ammonia then yes, it will be safe to move the other fish over to this tank. It is a good idea to keep an eye on the parameters for a couple of weeks to make sure all is stable.
It was only a 50l tank and wasn't sure I could of cycled from the small tank to a new tank. I will add them in now and will keep an eye on how it all goes over the next couple of weeks
 
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mattgirl

It was only a 50l tank and wasn't sure I could of cycled from the small tank to a new tank. I will add them in now and will keep an eye on how it all goes over the next couple of weeks
The size of the tank or amount of water really doesn't matter. The bio-load determines how much bacteria there will be in the tank. You could have moved everything from the small tank over to the bigger tank including water and fish and the bigger tank would have had enough bacteria to handle the bio-load of the fish you had in the smaller tank.

If you are going to break down the smaller tank you may want to go ahead and move the filter over to the bigger tank and run both filters for at least a month or at least move as much of the media as you can. Not really needed since this tank is now cycled but you aren't going to add too much bacteria. Personally i would keep both filters running. You can never have too much filtration and with two you have a backup should one quit on you. Quitting seems to be common with filters available today so running two isn't a bad idea.

I know this is like closing the barn door after the horse has already escaped but is just for future reference and for others that come across this thread one day.
 
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