I caught this sundial snail messing with one of my zoa,I notice a polyp didnt open for a day or two,so I look close and find one of these little effers toss em.. I use coral rx on everything and use as per instructions.. do these things survive the dip? How much dip can I safely add without harm to the coral.. I do like 2 capefulls per gallon inspect blast rinse the whole routine .. Now I have to keep checking for these damn things at night.