I have a 30 gallon nano reef tank I have micro fauna in the refugium just got done testing the water parameters and the parameters are perfect but I've had this green water for a month now tried turning the lights off for 3 days tried doing 100% water change in the course of a week the color Thins out but overnight goes back to the same thing I've tried putting snails in the tank but they died within 24 hours the tanks been established for 4 months I could really use your guyses input any input would be very helpful or any ideas would be very helpful thank you for your time


