My tank was sitting around 10dkh after the first waterchange. I lowered my 2 part by 20ml a day on alk, which took about two weeks to lower to 9 dkh and my chalices and corals are showing way better colors, polyp extension, and the tissue on the chalices are nice and puffy
I would find it hard to believe that a 1 dKH drop will make that much difference as well, but if you want to experiment and see what results you get:
You can use Muriatic Acid (approximately 33%-35% HCL) bought from a hardware store, you will need to use approximately 0.123 ml of the Muriatic Acid to reduce 1 gallon of salt mix 1 dKH. I would only use half the amount at first, stir your salt mix thoroughly to allow CO2 to dissipate and then test your result to make sure.
So, if you want to reduce 20 gallons of salt mix say 5 dKH, than you would want to use:
20 X 5 X 0.123 = 12.3 ml of Muriatic Acid (approx. 33% HCL) to reduce 20 gal. 5 dKH (Use 1/2 of this amount to start with).
You need to mix the salt mix throughly to remove the CO2 produced from the reaction before you test for alk & add it to your tank.
I would not recommend reducing alk using this method in your tank with coral, fish and other organisms.
Caution needs to be taken when using Muriatic Acid, it will irritate the skin and can burn the eyes. Follow all labeled directions on the Muriatic Acid container purchased. You need to use Muriatic Acid in well ventilated areas. Never add water to the acid, alway add acid slowly to water to prevent possible explosions and sudden release of deadly gases.
if you use muriatic acid you will also lower your ph. Go to a pool supply store for the acid..a gallon is less than $4 to drop your kh 2 points will lower your ph down to 5...not good, you then have to add an airstone to add oxygen to the water to raise PH back up without also raising kh
You are right on that issue. I was using sachem aquavitro salt and I could not get my calcium above 330. I was having tons of problems with calcium precipitation on all my tunze pumps and my Colors and growth were mediocre at best. I have switched to reef crystals and have the parameters improve right away no issues with the pumps and the calcium has remained steady for a month.