I thought u were doing a small reef. and yes u can do a single tang in a 37gallon. BUT only if you have a large sump!! thats the secret to some of theese killer small reefs and Nano's u see pictures of. For example if u dont have room for a big tank in your house but can work with several smaller ones and you have a basement. you plumb a sump in the basement with all your filtration and then to the tanks ect. Thats why i asked what size sump you have. For example a 40 gallon tank with a 100 gallon sump and killer lights , filtration system would blow away a 75 gallon tank with no sump. Just because you have more water volume which means more dilution and a healthier system.

Get yourself some medical syringes and a bottle of kalkwasser which is calcium hydroxide .. your gonna need to to kill aptasia its the most effective thing going. you stab the little bastards and inject them with it

It sucks everything seems to always be in the wrong state. If i had my reef stuff in FL id hook you up with what I have left.