So i was reading in this forum about the Sentia doser so i took the plunge, got rid of the old bubble magus and got these two bad boys. wow, This thing is amazing! everything is done through the app and unlike the bubble magus, which only dosed in 1ml increments, this thing can dose in much much smaller increments (good for a 29 gallon tank), it alerts you when your running low on additive, and it has an adaptive dosing capability which supposedly adapts the dosing amount to your tanks needs. i haven't gone into that setting yet. also went away from the all for reef and back to bionic which I prefer dosing alk and calcium separately. Included a pic of the tank as well. Super stoked. I appreciate this forum and the great advice I've gotten! Happy reefing!