pH meter compared to pH test kits

**vratenza** · 2nd Mar 2006, 22:56

ph-> ph meter better/more accurate than chemical ones?
i got a tetra ph test kit....like not very precise leh...

kh-> any good test kit to recommend?

thanks

**taz_boy** · 3rd Mar 2006, 00:06

ph meter?
hmm...not sure wat's that....but i'm using those nutrafin ph tester, add 5ml into test tube + 2 drops of reagent...see color and tally with ph..

prertty accurate i must say.......

**Cacatuoides** · 3rd Mar 2006, 12:40

there's ph meter and ph pen available in the market.....if you have several tanks, ph pen would be great to carry around.....if you have one tank and often monitor e ph level, a ph meter would be useful to provide ph readings 24/7.....ph pen is somewhat accurate but have to give n take due to various factors.....

**vinz** · 3rd Mar 2006, 13:08

A digital pH pen or meter would be much more accurate then a hobby grade chemical test kit if properly calibrated.

The hobby grade chemical test kits rely on the human eye to make comparisons with colour charts. There is a large degree of human perception error involved there. Furthurmore, environmentally lighting makes a difference in human perception. The lighting would have a different effect of the final perceived colour of a printed colour and a coloured liquid.

Most KH test kits are quite reliable. I like the one from Aquarium Pharmaceuticals. It also combines a GH test kit. Not easy to find in Singapore and it's been a long time since I went browsing in LFS.