I just bought 6 Nerite Snails. One of them hadnít moved for 3-4 days and appeared to be open and wouldnít close until I touched it and then it would SLOWLY close but not fully. So I went to return it and the fish store said it was still alive.
I swapped it for another snail and now a week has gone by a DIFFERENT snail is doing the same thing. Has not moved for 3-4 maybe even 5 days. During that 5 day span he had gotten flipped upside down and remained half open and kind of sticking out of the shell so I picked it up and touched it and it move ever so slightly.
What is going on? Do they normally do that, is it sick?
Water Temp stays between 78-80 degrees.
Ammonia: 0 ppm
Nitrite: 0 ppm
Nitrate: I do a 1/4 - 1/3 water chance once itís over 20-30 ppm
(usually) every 7-10 days