I had 2 clowns in 1 15g for about 2 years. They paired up but never spawned. I gave them to my friend with a 50g and they spawned like 3 months later... Yes an anemones will help. Make sure you get the right kind though, there are others on here that know more about that than I do... Clowns prefer certain anemones over others.
sweet dude, we thank you for the help. what about starting barebone with this biocube, does the filtration look right? on the right side, nothing is in there, is that right? and it have "live sand in it with no water, can i reuse this sand? thanks