At night when there is only enough light for me to see, these little critters come out and zip all around the tank. They are about the size of a tiny grain of rice. Their bodies appear to be clear, and you can see their spine. They seem to glide very quickly along the rocks and the sand. Almost like little fleas zipping all around the tank.
What are they??? Will they become problematic??? Or are they beneficial??? (I assume the later)
My tank is a 30 gal
. 30 pounds of live rock, live sand, 3 fish, 4 crabs, 3 anemones, 2 sand sifting starfish, 4 turbo snails, and maidens hair. 2 penguin eclipse filters, and 130 watt compact. I use "All in One," and replenisher cubes.