水草情迷

Hi all,

Currently I'm using serx ph tester to test the ph value but I can't sure the result because it is difficult to have the exact value by comparing the color charts.

For about the ph meter, I have some questions hope here experts can advice me;

1. Which brand is good?
2. How much is it generally? Which shop selling cheaper?
3. How to use? ---Just like to have a preliminary idea

Many thanks,

if you want a ph pen, reference
http://www2.aqugrass.com/phpBB2/viewtop ... ght=ph+pen

ph meter
http://www2.aqugrass.com/phpBB2/viewtop ... =ph+%BF%F6

or u can search more article with "ph meter" "ph pen" "h controller"

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