what should i do?

[epipeinfo]

Hello everyone my name is Adam and I have a 120g tank that I think i am having problems with. I have this tank for almost a year and my fish have not grown very well at all. I have a mainland 400 and a mainland 350 filter on the tank. Not sure if that is enough filtration for the fish that I have. Currently I have two flowerhorn cichlids, one texas, four parrots (were the ex's) one tire track eel, and two mixed africans. All the fish are around 5-7 inches and have been for about 7months. The parrots and the Texas are almost two yrs old. I figured they should have been bigger by now. I am seriously thinking about getting a canister filter but don't know what to get. If you have any answers please let me know.

 

[Anonymous]

More filtration is always good.

What are you feeding them? The parrots could be about as big as they will get.

How often do you do water changes and how many gallons do you change?