I use this http://brightwellaquatics.com/products/florinmultit.php
for dosing. In my large aquarium I plan to buffer with my tap water every 3rd water change or so, but the rest of my smaller tanks and paludariums with shrimp and snails, I'll probably try straight RO to see how plant growth goes with just dosing. I'd really love to try my hand at some carnivorous plants other than UG, so that's part of why I'm tryin to bring my pH down too. Anyways cheers!