Thanks, Kat. I saw your reply to my coco worm post but I think I'd better get a grip on my algae before adding anything else. I have a 40 gal tall tank. I have about 5-6 large turbo snails, 4 nas. snails, 4-5 hermit crabs, and 2 larch conch snails. They usually only surface when at feeding time, but I can see their "trails" often.I'm in Georgetown and using RO water. As for phosphates, I don't even know what that is. I'm new to SW and learning as I go. Hi, Cindy. I'm using RO water from a store called H20 to Go. I do 12 gal water changes, and come to think of it, I've done the water changes weekly for the last 2 weeks because my nitrates were high. I put the 12 gal of RO into a trash can with the salt (IO), buffer, & a powerhead overnight, then do the change. I got the "changing equip", buffer, and the lights all about the same time. And it was about that time the algae began.