Can I use spa ph up/down?

Das Jackal

Active Member
hello and thanks for reading my post. I have been having a great deal of trouble keeping my ph balanced. I recently bought a Milwalkee PH 600 tester. Seems to work ok... ANyways i was wondering if I could use the ph adjusters for my spa to adjust the levels in my aero space shuttle. I couldnt find any info regarding this so any knowledge is greatly appreciated. Also it seems the my ph is fluctuates very often. I mean I check it in the morning and it will say 6.8, then I adjust back to 5.6, but than less than an hour later its up to like 7.4. WTF??
 
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