Wow... that's alot of fishes for a 2ft tank.
In my case, nowadays i usually only keep at most around 20+ small fishes in my 2ft tanks. Even with lots of plants, i've found that i still need be very careful not to overfeed them to avoid ammonia spikes and algae issues.
I guess with a much higher tank bio-load, there will naturally be alot more feeding and alot more waste... so you'll definitely need to have very good filtration, clean the filter more often,be more diligent in removing all uneaten food and loose plant leaves, and do more frequent water changes, hopefully that will help to reduce the chances of ammonia and nitrates accumulating too high. Also monitor the oxygen level in the tank, as a high bio-load requires alot more oxygen too.
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