how many fish?

[OUfishman]

I have a 20 gal tank with about 8lbs of LR and 5lbs of other rock with a sand substrate. I currently have only one 4 stripped damsel. I was curious as to how many more fish I can add. I would like two clowns or a clown and something else. The damsel was not aggressive, but he has had the tank to himself for sometime now. Should I be cautious?

 

[fishfreek]

The damsel will be agressive the instant you add another fish to "ITS" tank. IMO return the damsel and get a pair of clowns. Thats all i would put in the tank is 1 pair of clowns and maybe some shrimp if you want more movment.

 

[goldy]

in a book i was reading , the complete aquarium problem solver , they say the rule of thumb is 3in to every net gallon of water , not what your tank can hold but how much water it actually has in it.hope this helps a little.