I have a seahorse tank set up in a 30 gallon tank all the levels are good and the last 3 weeks ive had a lot of red algae pop up in the tank and on the seahorses. can anyone help me on how to remove the algae without putting the seahorses in danger. everything I read about the different treatments all say can cause rapid level changes. I have cleaned the tank and did a water change and still cant get it under control. only thing I have tried is the phosphate sponge but still comes back. any help or tips would be great