Well actually I don't even use one!
What I do use is this http://www.ebay.co.uk/itm/270812409073? ... 1439.l2649
Cost £18 delivered & it is just great.
I know my tap water is supposed to be Ph 7.5 but, my device tells me 7.56, my tank in the morning is 7.8 & at mid lights on 6.42 = love it!!
A permanent accurate & very interesting display of whats going on with the gas in any corner of the tank ... just buy one
I have only had this for about two weeks & cant say how accurate or long lasting it will be but, I would be prepared to invest in a better model if needs be?
What I do use is this http://www.ebay.co.uk/itm/270812409073? ... 1439.l2649
Cost £18 delivered & it is just great.
I know my tap water is supposed to be Ph 7.5 but, my device tells me 7.56, my tank in the morning is 7.8 & at mid lights on 6.42 = love it!!
A permanent accurate & very interesting display of whats going on with the gas in any corner of the tank ... just buy one
I have only had this for about two weeks & cant say how accurate or long lasting it will be but, I would be prepared to invest in a better model if needs be?
