This has happened to me again, maybe i got a faulty batch, basically i thought my Alk consumption had gone up and no matter how I change my dosing it just wouldnt increase, so i decided to do the following
Hanna alk test: fill half my vail with 5ml of tank water, then add 5 ml of my AQ Alk, the results were the same as my test with only tank water 5.6, meaning all my alk had precipitate out in the dosing container!
I decided to do the same test with my old alk from red sea which ive had sat on ym self for years and my test turn blue and said 20
This happen before which is why im reposting this in my original article of when it happened last time, previously though the difference was dosing from the Purple aqua-forest bucket, this time i was dosing from a clear plastic container i've been using for dosing for a couple of years.
Im very close to not using AF products any more, every time this happens my corals bleach out i have to spend a fortune on salt water to do large changes and bring chemistry back in check so i really need to get to the bottom fo this or maybe someone else can suggest a good reliable balling method?