Hi guys i am just cycling my tank for the first time its been going about a month or so i am doing a fishless cycle i added ammonia the ammonia levels have dropped and im waiting for the nitrite to lower however i noticed a couple of weeks ago im getting algae growing on the sand anyone know what i can do to remove it? it seems to be getting worse i have kept the lights off to try and stop it getting out of control is this the right thing to do? i have no fish right now here is a pic any advice appreciated.