so i've had my 40 gallon set up for about 6 months w/ PFS, and as luck has it, it has gone anaerobic, releasing rotten-egg smelling bubbles whenever anything is moved. i've lost 3 fish and prob 2-3 RCS since i realized this in the past month. i'm planning to change to a nutrient rich, better sized granule substrate, probably eco-complete/flourite or similar.
i have a canister filter on this tank that i clean about once every 30-60 days. i plan to transfer all the fish and plants to a temporary bin w/ filter and heater during the substrate change.
so my question is... do you guys thing the canister filter will have enough nitrites to avoid an ammonia spike after the change? should i play it safe and do frequent water changes after? or is it safe to leave them in the bin with current tank water for about a week?
currenlty i change about 5 gallons twice weekly for 10-15 gallons once a week as it is. depending on how busy i am
pressurized co2 + dry ferts & seachem liquid micros (comprehensive).
i consider this tank heavily stocked @ 4 praecox, 6 rummies, 6 neons, 2 ABN, 1 otto, 20+assassins, 50+ pond snails, and 50+ RCS
looking for input and personal experience
thx guys! as always you are a huge help!!!