I have this type of SG setup, a 1 gallon 5" dia round plastic container mixed 10:1. It works well, although I'd prefer a narrower container but the Hydraline requires the larger size. Just dunk an HT into the container, cap it for the night, quick rinse the next day (with the tubing/rubber stopper tool). I also use this solution for my bubblers. Even though a couple fit into the container, I find it easier to just fill the pieces thru the joint especially the dewaar's, using a funnel or large syringe, cork it overnight. I know some avoid doing all this with RezBlock. I tried that and don't like it - keeps the glass clean, but there is still that stale odor; I need fresh water daily.