TDS Meters

[david540i]

I'm in the market for a new TDS Meter and looking into a dual mode. To measure input and output.

http://www.thatpetplace.com/pet/prod/235653/product.web?gdftrk=xh23lc0p/7HDy~g3JgKLc4/mPaNH7wkP/EoNCDPoF/KfnmclxYE/IKT9axUEge19ZRgrxLJWmASKLzXrtECC4CkpDUz34X2FVZlwvFcux3BJrTe1RpRi/tLo6Qk6ud0i

http://www.aquatechtrade.com/marketplace/mypage/products_detail.asp?mypageid=566&productid=1828

Are anyone of these better then another? Anyone use these and have any experiences they want to share?

Thanks

 

[tonymac]

I have used the HM and they work great. Never used the other, so I cannot comment.

 

[melev]

I've always used the handheld kind. It is so simple to use, and I can use it anywhere. I don't even know how you can calibrate those dual meters.