White dots on LR and Tank.
Basically, I've had this tank for about 6-8 months now. It's pretty much established. I do about 40% water changes every 2-3 weeks because I had a bad algae issue. Anyway, besides the algae problem, I've got new problem. Just yesterday I took a look at this castle thing that inside of the tank, well on it's underside were this flurry of white dots. Kinda grouped close. I tested the water and it's fine, everything was 0 except nitrates were at about 5-10. These dots are not on the top of the castle, they're also on the LV but only on the bottom side which is in the shade. I don't understand, is this normal? also, the tank has them but only very few places like behind the heater or behind the filter intake pipe. Any clues?
Fish are all fine, except the tomato clown likes to stay behind the water heater at the surface for some reason.
The tank is a 50 gallon. I've got a 1 inch flasher wrasse, 1.5" percula clown, 1.5" tomato clown, 2" royal gramma, 1" pink clown, 1" Yellow tailed damsel, about 3 Nassarius Snails (I think, although liveaquaria swears they are bumble bee snails, yeah right, bumble bee snails my *butt*)
and one very fiesty little yellow tang, about 3" in length. Yeah I know, I'm just keeping him for little longer until my friend gets his 90g established, he'll take it then. Any ideas?