Calcium Dispenser: Hard to Maintain Alkalinity

[john.m.cole3]

I have the tunze calcium dispenser. It connects with your ATO and holds kalkwasser in it. When the ATO kicks on, the water streaming inside the dispenser stirs it up, and a limewater solution is pumped out of the top into the sump.

My problem is keeping a steady alk reading with this method. I measure alk daily and add a rounded tsp to the dispenser when alk reads 8.3. The next day alk reads 9.3, then falls back down over about 10 days worth of time. does anyone use this and have a good way to keep things stable? @mcarroll don't you use one of these?

 

[Downbeach]

Kalkwasser is a good balance of both Ca and Alk, but depending on your load, kalkwasser (Tunze Calcium dispenser) by itself may not be enough to keep up with your demand. So, depending on some other variables, i.e. WC volume/frequency/SG, it wouldn't be too unlikely that you may have to supplement some alk to keep up with your demand. I would however suggest that you make your alk into a solution and dose it separately since along with increased growth in a system you may also have to start dosing a Ca supplement.

 

[mcarroll]

Measuring Kalk/Lime Reactor Output - Just Do It!

I'd run your recharge schedule based on testing vs timing.

(I have so little time for extra maintenance items than I have let my 5074 go idle and put the slack onto my two-part doser (a lowly Jebao 4-head). The 5074 will make a return to active duty someday though!)