steve wrote:Very strange that a small turtle and tank would cause such a cycling problem.
I wish that I knew. One thing, I know that it can't be chlorine in the tap water killing off the bacteria. We use an activated charcoal, whole house water filtration system which removes chlorine from all of the water as it comes into the house. Our tap water tests out for chlorine at zero PPM with my kit.
I went ahead and pulled out about 1/3 of the water in his tank this morning and replaced it with fresh which helped a bit.
Maybe a lack of surface area for the bacteria to grow upon? Most of the tank is currently empty and the 40i filter only has a small amount of biomass area to work with.
Anyway, we went back to Petco today and swapped out the 20g long tank (which we hadn't used yet) for a 55g tank instead. I'll probably start setting it up tomorrow (after rinsing it out) with a small amount of water from his tank to get the cycling process started in that one without the added issues of the pet actually being in there.
Hopefully that will give the bacteria a head start before I move the little guy into it later in the week.