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- Feb 28, 2015
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I have looked everywhere for this answer to a problem i a having and nobody can answer it for me.. I have a 90 gallon reef tank. everyday my alk goes from 9-10 to 4-5, i have to add baking soda daily to keep it up. My calcium levels drop the same way daily. When I add baking soda,or calcium i get these white hard to remove streaks on the glass, i have to manually scrape it off with a razor daily. for it to appear again a few hours later. I do weekly water changes using reef crystals my magnesium is at 1400. what is causing these streaks and why does my alk swing so much along with the calcium?