..Hey bro', just zipping by!- little ones looks great; for shock, get Superthrive or something else with B1 in it, plus the rest of the babies will like a little invigorating hit of that as well! As for filtration, go for it! I have a small RO unit made for the aquarium hobbiest, rated for 24gal/day... not that I use that much, more a measure of it's size, and expense to keep maintained! ...it comes with a regular (mechanical) filter, for particulates down to 5 microns; a carbon filter for chlorine, organic shit, metals, (BTW, carbon filters do nothing to soften the water, they don't remove calcium/magnesium carbonates, which is what makes water hard), then the RO unit... Look at an online aquarium supply store for them....

back later!