Goby Compatibility

[Ksnell]

Hello everyone-

I have a 20 gallon reef tank that contains 30 pounds of LR, 10 hermit crabs, 1 turbo snail, 1 cleaner shrimp, 1 percula clown, and some green star polyps (only coral for now, its a relatively new tank). All my levels are fine (0 ammonia, 0 nitrate, 8.2pH, 1.024 sp gravity), and I would like to add a few more fish to the tank, and I have 2 questions about that:

1) can different species of goby get along? I was hoping to add a green clown goby and a firefish, and possibly a yellow watchman too, which brings me to my next question,

2) if I had 4 fish total in the tank (the three different gobys listed above and the perc) am i overstocking my tank? i wasn't planning on adding anymore invertebrates except coral.

any help would be great. thanks.

 

[FishFrik]

R u using any skimmer, sump, fuge? The better ur filtration, the more bioload ur tank can handle.

 

[Ksnell]

i've got a red sea prizm skimmer, two hanging filters, and an aquaclear 30 powerhead in the tank

 

[vsnsofadrgn]

how long has the tank been up?

i had a 20 gal with 2 percs and i would say 4 fish is pushing it.... also, im not sure that the gobies would have enough territory for each of them... jmo. maybe someone else can chime in.