Wanted to run something by everyone. I have a very strange situation that I've never seen or experienced before. I have a 65 gallon batch of saltwater mixing right now. It's pretty low in alkalinity. 6.2 dkh. I have been trying to buffer it up for 2 days now with BRS soda ash. I have added over 200ml of Mixed soda ash and I can't seem to increase alkalinity. Never experienced anything like this before. Mag is testing at 1400 and calcium at 440ppm. I have tried 2 seperate Hanna alk testers with 2 different lot number reagents. I'm stumped on this. Any thoughts or has anyone ever seen anything like this? Hoping someone may know what might be causing this. Thanks in advance. Enjoy the rest of your weekend. Phil