sphelps.. im not sure what you mean i have to maintain even higher ALK with the oceanpure. my elos dKH test kits reads 6 dKH with the ocean pure. i would like it to be around 9. so what you are saying is that it has to read like 11 to be 9?? Im very confused now.
Yes if you want a true alk of 9dkh, you need to aim for 10-11dkh on the test kit, you may want to try and search for more info on this though, I'm not 100%