Same thing as balling method to replenish Alk & Ca (+Mg if you like). I love CaRx and will never go back to dosing due to the maintenance aspects. I just need to replace CO2 and media every 11-12mos. Beyond that — it’s pretty much autopilot.Thank you for the update! I was curious because I don't use calcium reactors on any of my systems anymore. I didn't know if there were any factors that were different with CaRX than Balling method. Glad to hear everything is fine!
Anyway, I screwed up this time when I added more media. To prevent overfilling the unit, I scooped out the water but instead of throwing it away, I dumped the highly concentrated solution into the sump, which quickly raised Alk/Ca. Worse - I turned the CO2 back online and went to bed — with more media, more Alk/Ca! Note to self: don’t do this again next year!