
I bought one of these units about 6 months ago and have had great luck with the alkalinity and calcium dosing in my BioCube 14. I am very stable. I have been using BRS 1.1ml pumps for my 20 gallon pump and it was time to swap them out for a more compact unit. The second unit I bought works and works well and I've had no problems with either. You are very calm. The only downside is that they are a bit tedious to program, but once you're done, you can easily change and modify the program. A NOTICE. This is an error in the Interval Days guide. You must select '0' for everyday use, not '1' as instructed. (Videos are available on YouTube and correct instructions can be found online) Would be 5 stars except for the issue with programming and instructions.

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