I too am fighting slime algae right now. I can't figure out where it came from either. RO water has been used since day 1. Nitrates are below 10 and phosphates are 0. I have cut back on feeding. The tank is a 180 with about 300 lbs. of live rock. Skimmer works great. Could it have something to do with having new metal halide bulbs and they aren't 100% burned in. The bulbs have been in use since September 15th. They are on for approximately 8 hours a day. One is a 400W 10k German bulb and the other 2 are 250W 10k CSL bulbs. Fish load is minimum. Phosphate remover is used and chemipure is used. I am completely baffled. Any clues or ideas?
Thanks
Keith
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