is this enough filtration?

[Bderick67]

I would suggest researching the nitrogen cycle, understanding htis will greatly aid in maintaining your tank. Buy a quality teat kit and learn to use properly. A 90 gallon tank with your stock is not going to have a nitrate level that is very low, you will need large frequent water changes for this. Also standard aquarium filters do not reduce nitrate levels, you need be more concerned with ammonia and nitrite levels regarding your filtration.

IMO the filters are not the issue, others have already mentioned what are.

 

[12 Volt Man]

^ agreed.

but I do think that the filters currently are too small.

the redtail cat will be able to swallow the entire AC50 in a few months time

its not a big filter at all. very small for that sized tank.

 

[benzjamin13]

Can't have too much filtration with that stock.

 

[Merbeast]

Buy a quality teat kit and learn to use properly.

I love this idea! Where can I get one, and how do I use it?