Most pesky algaes can be controlled by two things: 1- reduce your organic load, and 2- increase your alkalinity. To reduce your organics, make sure your protien skimmer is working good. If you don't have a skimmer, get one. If you cheaped out when you bought your skimmer, upgrade it or just increase your water changes. I eliminated my hair algae by stepping up my water changes from 20% per month to 20% per week. To increase your alkalinity, do more water changes with a properly balanced salt mix or use an alkalinity buffer. Make sure that your buffer is not just pure bicarbonate (HCO3) though, you need carbonate (CO3) also. Your skimmer will work better with an elevated alkalinity as well. shot for 4-5 meq/L for your alkalinity.
Rick
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