reefrunner69
Aquarium Advice Addict
I agree, it does look like it could use some more light, I would also move it directly under the bulb, a few inches per day until it is in the sweet spot, but it is showing a classic look for preadtory snails. They are difficult to see, they will hide in the sand at the base of the clam and come out at night and feed on the clams mantle. shortly ater the lights go outm look at the clam with a flashlight, they do look like small grains of rice.