KZ Reefers best salt alk 11

[Roskoreef]

Im getting ****ed off now.

Reefers Best Salt 99$+ these days, 160 Gallon yeild for what?

This salt is supposed to be Alk 7, first 3 boxes were pretty close , 7.7 at the highest. Last 2 boxes, Alk 11! WTF. I run my alk at 7-7.5 with zeo so..

Help, how does one:

a) Lower Alk of NSW
b) Do water changes with an alk difference of 4

I have alot of fish, i rely on weekly water changes to keep my phosphate and nitrate down to keep my sps as happy as can be..

stumped...

[Myka]

Muriatic acid will lower alkalinity specifically. It will also temporarily lower pH to a dangerous level. I put the RO in the tub, add the Muriatic acid, then add the salt, let it mix for a day with a powerhead.

I had the same problem with H2Ocean...alk was 7.5-8 some years ago and now 9.5 is typical. My tank alk is 7-7.5 so I adjusted pre-waterchange. This is the leading reason why I decided to pull the trigger on trying out the Aquaforest method.