It's vinegar, ethanol, and a bit of methanol and isopropyl. https://www.reefcentral.com/forums/showthread.php?t=2533305
If you plan on using it, go very slow. And don't expect great results vs. lanthanum.
Grandpa in @derek_SR 's tank was kept as the solo tang on SF Bay brine and spirulina flakes for 26+ years with no HLLE or bloating ever. Just some male pattern baldness (dorsal fin recession). Lots of ways to skin a cat. Old school way was daily romaine lettuce and occasional peas if bloating...
I've been using Champion Lighting more lately since they sponsor both @Thales and Reefbum. Plus Todd is just a cool guy and always is willing to help out.
Saltwater aquarium is good too, all the freebies you can add means I never need to buy frag plugs.
BRS has such a limited catalog now...
Looks great for just a week! Things have changed so much in the freshwater space since I last did it. I always remember nitrite being the problem in FW, how's that looking?
Exactly, that's why the better term some people use these days is alkalinity reactor. The old way was adding some dolomite if Mg was deficient in the coral bones you're using.
It's also not that much work to keep going. @Dan-sf kept his SPS tank going just with that for a really long time when he wasn't able to do any work on it. Those colonies were massive when @Turkeysammich helped pull them out.
If you need more, we can probably find some from members in the club that would gladly trade it in once they finish their DBTC obligations.
In fact if you ever had an updated "buylist" of corals or macroalgae that people could trade in here, I'm sure they could help you from having to spend at...