Yes ! They are all over the place . Gets hard to clean the glass cause they are in the way and won’t move they’re in the power heads, plumbing , just everywhere A good problem to have in reefing.Sometimes i catch my snails spawning. My water gets cloudy. Than I watch the males release sperm and female release eggs. I have grown them to adult size in my tank. At first I liked it knowing I never have to buy snails again. They became a problem they were all over the place.I found tiny snail in pvc which eventually can become a problem if they grow.