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#7
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![]() Here is what I would do:
1. Step up your water changes to weekly 15% of the total water volume. However, now that you have a pretty good cyano problem, I would probably do a couple of 30-40% water changes to help lower nutrient levels. Great that you are using RO ![]() 2. Adding some macroalgae will help utilize the nutrients in your tank. Depending on the species of macroalgae, your tangs may eat it too. 3. I would agree that upgrading your skimmer would help. However, we don't skim our tanks, but keep the number of fish to a minimum to reduce bioload and nutrient production. 4. If you haven't changed your lights in over a year, doing so will improve the quality of light in your tank and may help reduce the cyano. However, changing your lighting alone will not solve your cyano problems. 5. Get a magnesium test kit and start using it weekly until you have a sound understanding of the magnesium needs of your particular system. Magnesium is as important to overall water chemistry as is alkalinity and calcium. Here are some articles on water chemistry: Aquarium System Volume Calculator: http://home.comcast.net/~jdieck1/volcalc.html The Reef Chemistry Calculator: http://home.comcast.net/~jdieck1/chem_calc3.html Magnesium in Reef Aquaria: http://www.advancedaquarist.com/issues/oct2003/chem.htm Solving Calcium and Alkalinity Problems: http://www.advancedaquarist.com/issues/nov2002/chem.htm HTH ![]() |
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