Doh!

My saltwater tank is going thru a pretty heavy diatom algae outbreak, heavier than it should be. I suspected phosphates were the cause so I looked up if the Brita tap filter I’ve been using filters them out and to my surprise it doesn’t. It turns out I should’ve looked that up because this kind of assumption/result can really fuck up a reef.

I’m going to pick up an extra 5gl jug of distilled water tomorrow to do another water change in a few days.