40 gallon breeder fluval FX5

[Industrial]

Rough!

Anyways, there is an end all mini monster thread on here with fish than can be housed in smaller tanks.

http://www.monsterfishkeepers.com/forums/showthread.php?t=227845

I'd say anything that maxes out at 9" would be comfortable in a 40, and anything that maxes out at 6" would look comfortable to you as well in the tank.

 

[Jgray152]

Just throttle down the output aquastop valve and you will be fine.

 

[aclockworkorange]

40 gallon breeder is a great footprint and you have a fair amount of stocking options.

Let's focus in on a tank category... Community, species, planted, etc...

Then focus in on the type of fish you want... Cichlids (African? American? Big? Small?), bottom dwellers, small community fish, etc.

 

[ntboy09]

why don't you split the outlet/return hose into 2 return hoses, put one on each corner, you should have 300gph on each return hoses.

 

[Jgray152]

If he were to split the output, he should split it into two 1" or 1.25" tubes to reduce velocity and keep the flow up.