Snails fall off all the time but unless completely upside down have little trouble turning over if they want to. If putting your hands in the tank to turn them over make sure you wash and rinse well before doing so. I'd use an algae scrubber stick or similar tool to flip them to reduce contaminating the tank.
Keep a close eye on any snails that donít move for 6+ hours and smell the inside of the shell (not to close) to make sure they haven't died. Just because they don't move doesnít mean they are dead but they can foul a tank quickly if 3+ die at the same time. (Usually a new batch that wasnít acclimated long enough or sick is the cause)
LONG 2+ hour drip acclimations are highly recommended and if they survive the first 2 weeks you usually are in the clear and they are fairly hardy as long as your water parameters donít change too drastically.
Your ph does 250 gph
max which if your soul source of movement for your 45 is about a 5.5 times turnover per hour. I assume you have either a sump or HOB
filter that is adding to the current but overall you want around a 15-20 turnover on your tank or about 700-900 gph
hex tanks make great FW
tanks but are harder for SW
due to the more limited oxygen exchange in SW
. Good currents and strong rippling surface action is a must for tall tanks with limited surface area.
I'd run your ph on full, snails in the wild deal with much stronger currents and have no trouble "sticking" if they want to. They drop off the glass on purpose so they donít have to move back down to the bottom.