Just a reminder for folks who mix up big batches of SW for water changes and such. Test it periodically and be sure to scrub out your containers every now and again, in our case I use 3x34G trashcans and like to let it age for at least a week, but I just tested what would have been next week's water change and it reads 60ppm nitrate! Want to dump that into your reef?

Down the drain it went and I found that even though it remains sealed, heated, nd circulated with a PH, there was a fair amount of algae and crud on the sides. I can just assume that leaving it empty for a couple days lead to decay of the algae and whatever else was growing in there. My own fault it's been a good 4 months since I've cleaned that one out.

But a good lesson learned so figured I'd pass it on.