Unfortunately I had a fish die in my 5 gallon nano earlier this week and it triggered a chain reaction because of the toxic ammonia released. I've got it under control now but since I'm planning on stocking it with Acros next week I want to have the microbiome on my side with live ocean rock and worried the VERY high ammonia may have killed off a good bit of healthy microorganisms. Should I but a few new pieces of live rock straight from the ocean to replenish a little before adding the Acros?