Pentair R161178 No.2 pH Test Solution, 1-Ounce

Very reliable testing solution.

This should give you a general idea of your acid levels on your kit. Good replacement for the super old reagent I had just run out of on my kit.

Replacement for the pentair rainbow ph solution.

OEM product

Just what I needed to replace my used up product Product arrived promptly and in good condition

We got this to replace some in our test kit. It seems to work well.

I will not buy this product again. The solution seems to be diluted and indeed a side-by-side comparison of 'PENTAIR' brand with 'POOLMASTER' brand it is obvious that 'POOLMASTER' is much darker and that difference is noticeable when testing your water and results in inaccurate test results. I always double check using both test strips and test solution when raising pH as I have been doing with all the rain we're had in my area. I do this as a control to insure I don't over-acid my pool. When the 'POOLMASTER' test solution ran out I ordered the 'PENTAIR' from Rare Pool Parts. Immediately I noticed the test results were not mirroring each other and the solution test indicated the pH was way down while the strip test said it was ideal. I went to my local pool supply outlet and bought a vial of 'POOLMASTER' and the test results are back in sync now. You can see the color difference in the attached photo. I have asked for a refund.

The solution just makes the test water the same color as the solution. I tested the same water with solution I've been using and tested fine. Used this solution and the color the water turned wasn't even on the range of possibilities. Tried to return and could not. It looks like it's highly rated with hundreds of ratings but only a handful from the US. I've never written a review for a product - but since it can't be returned I thought I should.