inverts, should be kept over 1.021, IMO
but the reason i asked, not 1000% sure, but i recently read that the snails seem to hold much betterat 1.026 or real close(maybe 5 and a half), i was wondering because, i have lost fewer, sincewe raised ours(for other reasons, so i never payed attention to the snail loss, but i do know i have lost almost none if any since), anyhow, i was wondering, to seee if maybe there may be some merit to the fact
like i said just curious
as for your snails, look at their undersides, when they are on the glass, ther bodies are actually black or dk brown, on the trochus(the foot or what ever it is called is still pale), but the tentacles and head and such are black or dk brown
the nassarius are cool lil guys toooo,
fast! man can they move