PH Pen - Which brand is good?

[woodlands]

Anyone here uses the PH pen instead of test kit? can tell me the pros and cons beside the price difference?

what brand in the market are available?
where to buy one at a good price?

thanks.

[David]

do you have several tanks to monitor?....if its just for one tank, you may want to get the PH indicator which is also a CO2 indicator. The fact is that a PH pen needs to be calibrated every month or so.......

[loupgarou]

eutech ph scan 2 is the same one as the denerlle ph pen (ie: rebranded)

[Rummynose]

Hi....
Where could i get the pH pen?
How much?
ThankS!

[PeterGwee]

Most LFS carry it...just to name a few..C328 auntie..polyart..