How many of you use a TDS meter?

[tsprice82]

I was looking at getting a TDS meter and wonder how many reef keepers have one and regularly use it?

[FishyTim]

I use one...just to test my ro/di unit...

[Origami]

I do, too. Once a month, I take a scheduled reading off of my RO/DI to make sure that it's not in need of unscheduled maintenance.

[ReeferMan]

I use one

[blaze98]

I use one also

[shawns]

me too. i use it about once a month for ro/di water.

[Stephen]

I use one to test my RO and RO/DI water once a week. Or everytime I make new.

[Hilary]

I just used mine since my filters are now 10 months old....

[YBeNormal]

Yep, all the time. This one: http://www.airwaterice.com/product/DM-1_HM...e__Monitor.html

[tsprice82]

Thanks for the responses.