Refractometre/PinPoint Salanity monitor/Milwalkee Conductivi

[fishnut]

To Willito:

I find my refractometer and PinPoint pH monitor indispensable.

There is practically no maintenance with the refractometer, except to occasionally calibrate with RO water, and it takes almost no time at all to get a reliable reading (IMO).

The pH monitor requires probe cleaning and calibrating only once a month. I use mine with a battery, and switch it on only when I want to take a reading.