Cheap and somewhat accurate TDS/PPM Tester ?

[jm82792]

I have not bought a RO unit yet since my use of it is minimal for now,

however I want to buy a cheap yet somewhat accurate TDS/PPM tester.

So I can know if it's good water since I'm having a terrible hydroid and sponge take over,

and want to rule out my topoff water.

I see a couple for $10 are they decent enough to roughly know if my RO water is good enough for a reef ?

 

http://cgi.ebay.com/NEW-OAKTON-TDSTESTER2-...=item5ad369c74a

[jeffblly]

I dont know about the one you listed but I have not had any problems with the HM TDS-3 that you can get for about $17 shipped.

[jm82792]

Okay thanks

[AZDesertRat]

The TDS-3 is probably the best low cost meter. I prefer a little better meter myself so use the COM-100 for its extreme low end accuracy. Same company, HM Digital makes them both.