So, I'm about to set up a 20L for growing aiptasia. I've always wanted a Fu Manchu lionfish. Thoughts on putting one in the 20L? It would be the only fish and no coral other than the aiptasia.
I would say even 30g may be too small. While this is one of the smaller lionfish, ive seen them get much larger than what liveaquaria says. I think the largest i saw was 6-7". But 30g should work for a good while.