I do 5% water change per week, CPR bak-pak 2r skimmer and MJ-1200....also have a HOB filter (minus filter-just carbon) for water movement. Im running my lights 7 hours per dayMihai":1q4iwehc said:Don't put chemicals in your water. That will only treat the effect. Cyano comes with dirty water (lots of nutrients - do you have a skimmer? what?) and/or poor water movement.
M.