Swapping from Kalk to Sodium Hydroxide

[.Haliax.]

I'm preparing to make the change from dosing kalkwasser to dosing Randy's DIY recipe.
How can I determine a safe starting point in regards to mL per day of sodium hydroxide?
I'm currently dosing 4076mL of fully saturated kalk per day in a 125g system.

 

[ColoredRock]

Why switch?.. just supplement with 2 part?

 

[.Haliax.]

Why switch?.. just supplement with 2 part?

I am looking to switch because my kalk stirrer has been very inconsistent and not properly mixing. I have limited room so cannot keep a big tub of lime water near my tank. I would go with strictly 2 part if it increased pH

 

[ColoredRock]

This might help...

https://www.reef2reef.com/threads/kalkwasser-and-two-part.772116/page-5#post-11792354

 

[ColoredRock]

http://reef.diesyst.com/chemcalc/chemcalc.html

 

[KStatefan]

Use the calculator linked above figure out what you are added daily the use info from Randy's recipe to figure out how much you need to match the same.

 

[Randy Holmes-Farley Verified Community Expert]

I calculated for someone rise today that the alk part of the two part is about 45 times more potent than saturated kalkwasser.

 

[BJmcconk]

@Randy Holmes-Farley what is your take on sodium hydroxide and all for reef? I doses about 10ml’s/day at night. But I’m thinking I shouldve stopped the A4R during the night. I’m trying to get my pH up to that 8.3 mark. Can’t get past 8.1 with just a recirculating CO2 scrubber.

 

[Randy Holmes-Farley Verified Community Expert]

@Randy Holmes-Farley what is your take on sodium hydroxide and all for reef? I doses about 10ml’s/day at night. But I’m thinking I shouldve stopped the A4R during the night. I’m trying to get my pH up to that 8.3 mark. Can’t get past 8.1 with just a recirculating CO2 scrubber.

There’s nothing wrong with using the combination, but I also likely would not continue AFR if you are going to use a diy two part using sodium hydroxide.

 

[BJmcconk]

@Randy Holmes-Farley what is your take on sodium hydroxide and all for reef? I doses about 10ml’s/day at night. But I’m thinking I shouldve stopped the A4R during the night. I’m trying to get my pH up to that 8.3 mark. Can’t get past 8.1 with just a recirculating

There’s nothing wrong with using the combination, but I also likely would not continue AFR if you are going to use a diy two part using sodium hydroxide.

that will probably be the plan. A4R is so easy and the corals seem to like it.