Well, we're still struggling with nitrite spikes and ph
fluctuations in our 40-gal FO
tank. In fact, we had a big spike after last water change / vacuuming session. It got up to 1.6, the danger zone as I understand it. I think it was caused by the vacuuming churning up waste food that had been lying quietly in the substrate. Plausible?
We have six fish, biggest is the fat 4" puffer who eats more than all the others combined. We've been feeding one pellet of frozen sponge-etc food and some flakes nightly. 2" CC
substrate, no LR
(yet), Fluval 204 filter. I know we are overcrowded with fish, but can't do anything about that due to family politics. So I'm trying to come up with ways to cope with this. Here's where I'm heading:
- Converted 2nd basket (of the 3) in the Fluval to bio-habitat. Now have 2 of biohab and one of charcoal (was reversed before). I hope in a month or so when bacteria colonize this, we'll have more bio-filtering.
- Planning to get some more CC
to build up deeper substrate. Again, after a month we should have more bio-filtering, right?
- Thinking about adding some LR
. Wouldn't this add some bio-filtering capacity?
- Am I on the right track in thinking that basic problem (aside from too many fish) is overfeeding?
- Will my attempts at increasing bio-habitate for bacteria help?
- Is the Fluval 204 too small for our tank? (Directions say 40-gal
- Would conversion from CC
to sand help significantly?
Apologies for long post. Very grateful for any advice.