i get a lot of my containers at a restaurant supply store. they have all sizes and shapes, lids, markings on the sides to show how levels etc. I probably have 10 or 12 of these for various things like: doser tanks, mixing tanks, ATO tank, etc. I even swiss-cheese drilled one to use as a holding container to acclimate new fish, corals, or to temporarily hold some frags. I just basically submerse it on top of DT and it gets plenty of flow thru etc. Anyway, the restaurant supply places have a lot of things I use on my system.

