can i add a fourth fish?

[deacon hemp]

I set up a glass 18 gallon cube a few months ago,

i have a pair of 1/2 inch black and white saddleback

clowns, and 1 inch blue,pink spotted watchman goby,

20 lbs lr,18 lbs ls,2 shrimp ect.I was wondering if i could

add another fish.i was thinking of a small firefish or

cardinal?I will be posting pics in a couple of days.

[Bocephous]

I wouldn't, will let others explain why. I'm tired

[chufa]

I hate rules of thumb, but that's the only thing I can give you, since I am more inexperienced that you are.

 

ROT: 1 inch fish/30-50inches water surface area. Your tank, if I am not mistaken, is 12x12, then approx. 3-5 inches of fish. Of course this depends on the type of fish, metabolism, etc. Right now you would be fine, but down the road just the 2 adult clowns will fill your capacity.

[deacon hemp]

It's actually 16x16x16 and i'll have a 5.5 refugium

and plan on taking back the urchin.