Are Hermit crabs and/or turbo snails a desirable addition to a marine tank? Do they need to be added when the aquarium is ready for fish or are they more hardy? I've read that hermit crabs can attack certain types of fish which sleep wedged in rocks. Is this a common problem? Finally does it make any difference if they have red or blue legs?
hermits are great clean up crew, i'd personally add blue legs, but thats just cause i prefer the colour, turbo snails are great for algae but u should still clean the front glass as they tend to leave streaks of eaten algae through the algae
sand sifters and serpent stars are good to add as well as shrimp as shrimp are faster to get to uneaten food than crabs so can get rid of it faster
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There are lots of different colours when it comes to hermits. It is nice to have a variety as they all have the same habits etc anyway. I would certainly add the hermits, cleamer shrimp and turbo snails to the aquarium before you add the fish. If you get your hands on various empty shells they are worth putting in too, so the hermits can move to bigger homes when they need to. Hermits seem fine with everything in my tank. The only thing they do have is sharp little feet! They do leave scarring on some corals where they walk over them, but a lot of corals will cope with that.
Nothing should be added to the tank for a while anyway, until you really are sure the test results are stable. You can risk putting in the snails and hermits though. They do not need specific feeding as they will graze the rocks and glass (obviously the crabs can't go up the glass ). They will also eat any food you put in for the fish. They hold their own. Shrimp are known scavengers so you don't have to worry about them either.