Davek410 said:I am relatively new to the marine world and am constantly learning, I have a 75 gallon tank (1 year), glass cover (hood), lighted with 48" marine-glo (40W) and 48" power-glo (40W), about 50 lbs live rock, 20 lbs live sand (I guess?), no alk test kit but will make a trip to pet store tonight. If I understand completely, I believe I have macro algae, red/maroon algae sometimes on my sand and green algae on my live rock, and back glass of tank!?!? Will simple water changes help my nitrate levels?