OK. I went to LFS
and get an AP test kit ( they dont carry the Salifert kit), this kit includes tests for Calcium, Kh
, Nitrate and phosphate. And the results are as follows:
Phosphate : 2ppm
I am a little confused about the Nitrate. I did the test with the new solution just bought and it read 10ppm and with the old solution bought about a year ago from the same brand and it read 20ppm. Why's the difference ? is there an expired date for these test kits ????
In addition, I also test for phosphate the fresh water that I use for topping off and found out that it contains 1 ppm
. The fresh water is coming out from the filter unit that I bought for drinking, the picture of this unit is enclosed, the labels on it are Pre filter, Post filter and Carbon filter. Is this what you call "RO
" unit, if it is not, can it be converted into an RO
??? Thanks in advance.