How much 2-part at one time is dangerous

[Esabasard]

I have been dosing B-Ionic 2 part successfully for the entire life of my tank and recently I have needed to increase the amount of each component to keep the desired levels. I know that the 1st part can have an adverse effect on pH. How much does it take to be a problem and is it ever really a problem. I am dosing 16mL of each in my 20 long nightly. All at once with a couple of minutes between parts.

[Rocket]

I know Magnesium is 100ppm a day max....

 

Reef Calculator I trust: http://reef.diesyst.com/flashcalc/flashcalc.html

[Weetabix7]

Since they can raise PH, esp the Alk component, it is best to dose it in the morning before lights on, when PH is at it's lowest.

[Esabasard]

Ok, I can change to morning dosing, but how much B-Ionic will cause too much of a pH swing too fast? I am not as concerned with raising total dKh, but rather maintaining levels and not causing negative effects i.e. "don't add more than x mL / gal at a time"

[doctaq]

you can slow down the dose by diluting it with water, and dosing multiple times a day, or adding it to your top off.

[Amphiprion1]

The amount will be variable depending on CO2 concentrations, starting pH, and total alkalinity. It will also vary by brand, since some use sodium carbonate, sodium bicarbonate, or a mixture of both. As a very rough guide, expect roughly around 0.04-0.3 units--again, this will still vary somewhat.

[Esabasard]

What do you mean by "expect roughly around 0.04-0.3 units"? Units of what? I have only used B-Ionic so far, and I don't know what chemical it uses or what it would mean even if I did know.

[Amphiprion1]

What do you mean by "expect roughly around 0.04-0.3 units"? Units of what? I have only used B-Ionic so far, and I don't know what chemical it uses or what it would mean even if I did know.

 

pH "units" (doesn't really have units, but you get the idea). I also forgot that you should expect very roughly that amount per .5 meq/L (or 1.4 dKH) of alkalinity added. That last part was kind of important--sorry about that, I was rushed. This assumes alkalinity is already within normal range (~7-11 dKH). B-Ionic normally uses sodium carbonate, which will raise the pH comparatively higher per unit of alkalinity added--so count on that upper range I gave of ~0.3.