Reliable po4 test

I have been using salifert, but their color chart is so hard to distinguish. Three people can look at the test and have three different opinions on the reading. Does anyone have another reliable test? Read more: Reliable po4...

Reef Crystals caused cyanobacteria, red slime

Reef Crystals might actually be the cause of my red slime cyanobacteria I realize the idea of Reef Crystals salt mix, as the cause of cyanobacteria, is going to be controversial, but bear with me. Read about my findings, and judge for yourself. Summary: When I stopped using Reef Crystals, my cyanobacteria...

Help with low salt levels

I would like to know the best way to raise my salt level for my reef. I just aquired a 90 gallon reef two weeks ago. I do a weekly 10 gallon change and I make sure my fresh salt water is at 1.021. When added to the tank, my reading in between 1.019 and 1.020. It seems a little low. What’s the best...