I have been having an algae problem in my tank. It is on everything from the glass and sand to the live rock and heater. I clean the tank and within hours to a day its growing again. I added a few more snails but they only do so much. I thought my nitrate was a bit high so I am using a nitrate sponge now. I even added an lawnmower blenny which helps but the algae grows too fast. I am using test strips most of the time and they are showing my alkalinity higher (more blue) than whats on the test strip, and was wondering if this is a problem and what I should do. One last thing is my hermit crabs have really been acting strange the last two days. Usually there always moving around but lately they have been just hiding in there shells, at first I thought they were dead buy they moved, one of them even partially buried himself in the sand. Any suggestions Thanks again everyone for all the help.