Age old Kalk Questions...

PocketGoose

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Howdy!

Long story short - I'd like to start dosing some Kalk via apex DoS to my tank. Uptake is roughly .4-.2 daily in alk.

The reason I'm choosing kalk is to hopefully stabilize my pH levels as a benefit. Most days I'm seeing 8.1 at peak to 7.7 at the low, but have seen it scoot down to 7.6 with a full house. I'd like to tighten that bottom number up a little bit more.

First time trying this method so any insight is helpful. I'm assuming the majority of dosing will take place a few hours after lights out, right around 10pm is when I'm seeing pH fall below 7.9.
Anybody running Kalk with an apex care to chime in for a simple program?

I'm also unsure of how much dkh increase I can expect and I apologize if this has been answered but all I've really picked up is "dose and test" which is fine, just curious if there is a "standard"

I could also cut down on the potency to start and see how things react.

My plan - 1gallon of RO/DI and 2tsps to fully saturate, settle and siphon off the clear layer. Ideally I'd like to use some old dosing bottles to house but from my research is seems like I will fly through kalk and will likely need a larger reservoir.

FWIW the main purpose is to supplement lost alkalinity, I'm not shooting for elevated pH levels to increase growth or anything but hoping to put a cap on the low pH maybe 7.9-8:) end while supplementing alk.

14 gallon IM Peninsula - mixed reef, almost 7 mos old. Just starting to see coralline take over, SPS growth is minimal if that haha.

Thanks in advance!
 
It is easy to calculate how much the alk will increase from a dose of limewater (kalkwasser). Use this calculator:


in 14 gallons of water, 180 mL of saturated limwewater will add 0.4 dKH of alk.

However, if you do increase the demand, you will also increase the demand for alk, and that may mitigate the rise.
 
It is easy to calculate how much the alk will increase from a dose of limewater (kalkwasser). Use this calculator:


in 14 gallons of water, 180 mL of saturated limwewater will add 0.4 dKH of alk.

However, if you do increase the demand, you will also increase the demand for alk, and that may mitigate the rise.

Thanks Randy - this helps a bunch. Seems like a good starting point to me. With that dosing schedule I also don't think i'll have to worry too much about evap/salinity issues too. I' can spread that out through a decently long period of time.

I know I mentioned the benefit of a rise in pH - we were all out town this weekend (dogs included) so none of us mouth breathers were around to contribute to the Co2 in the house. Apex tracked 8.2 on the highs and 7.9 on the low end..which would be ideal. The occasional 7.6 I'll see alarms me...pretty crazy how much we can affect the ambient levels of Co2 in our homes...
 

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