How much water on a tank?

[jnmrcs]

How much water should I put on a tank? It's 3/4 good enough or need more?

If needed, I got 2 tanks:

30 galons, 1 male betta and 5 angels
20 galons, 4 guppy, 4 colorglass and 4 neons

Thanks.

[rollie]

you mean, in the tank, right. fill the tank up to within 2 inches of the top. if you got the power filter it will be easy on that to. your tank will look better to. plus your fish got more room to swimm.

[jnmrcs]

Yep, I was talking about the tank.
Thanks for the advice.