20g Frag Tank Fish

[tallguy88]

I set up a 20g glass bottom frag tank that is tied into my main 210g Display Tank. I currently have a couple corals in the tank and see some algae starting to grow on the frags. What kind of fish would be a good addition to such a small frag tank to combat this issue and other pest issues? I have read other posts everything from wrasses to tangs but because it is such a small tank I am unsure if these are good options. I have 3 red hermit crabs in their now which seem to be doing nothing.

Tank You!

 

[m3t411ic4]

A blenny is probably the best option in a 20 gallon, but most blennies like rock for security. So, I'd suggest at least a few pieces of live rock or at least some PVC. A 20 gallon is on the small side for a lawnmower or starry blenny, but I've also read a lot about tail spot blennies consuming nuisance algae. Whichever you go with may need to be supplemented with nori if they end up cleaning out the tank.

 

[pyithar]

some snails like turbos and trochus or a small urchin would be better i think. i have a tailspot blenny and he nips algae here and there but he can eat just a little bit.

 

[WaReefer458]

Try and find a small sea hare. They are butt ugly but eat algae like crazy