thanks for warning me guys. I was wrong to not test for it, you are right Subie. I have read that is it used up quickly by algae and organisms and I wanted to make sure my shrimp could properly molt. Thanks Spanko for letting me know it gets replenished by water changes, looks like I wont be needing it as much as I thought I would. After some more research, it looks like it's a debatable subject but looks like I wont be needing it because of weekly water changes and feedings. Glad I got only a small bottle of it.
Do you guys have any supplements you would recommend using? Calcium, kalk, stuff like that?