I don't get it. The day after my water change the glass gets covered with tiny green hair algae.
Been doing water changes with tap water for the last year without any issues. Since I managed to lower my nitrates considerably (15-20 ppm
down from 40) in the last month I figured this was now the time to switch to RO
after witnessing this last week.
But same effect this week with RO
water measured 0 nitrate and phosphate.
My tap water also btw.
Salt is Instant Ocean.
Anybody have a clue what is going on?