the drain fitting is so you can attach a hose to it and run it to a secondary collection cup so you don't have to dump the skimmer as often.
your snails have probably decomposed already and the crabs will nibble on them. i wouldn't worry about pulling them out
i meant what all was in the medication you bought (trying to assess any long term problems it might cause)
your snails have probably decomposed already and the crabs will nibble on them. i wouldn't worry about pulling them out
i meant what all was in the medication you bought (trying to assess any long term problems it might cause)