I just read somewhere about a commercial grower that only uses the ph strips to test. In fact they advise against even using a meter. Of course you will still need the ec but it may save you money if you dont have to buy a 2 in 1?

I've been looking for a 2 in 1 and they are all like $450+!! I cant spend THAT much LOL although I would consider spending more than $60 on such a crucial piece of equipment.

i use those cheapy dipsticks that i bought on ebay.

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I use those liquid drops to test ph, and a HM Digital COM-100 which is the best bang for buck TDS meter IMO.

gmcd That's the one I have my eye on, but I wasn't sure if that was reliable so I haven't bought it yet.

For pH, i use a pH test kit, with drops of pH sensitive dye. Cost about $10, more then accurate enough for what I need, and I don't have to worry about replacing pen tips. I set up my pH at the beginning, and put in an air bubbler to agitate, mix the pH Down in, and also clean out some of the chlorine thats in the water. Then put it in my system and forget about it. I've checked it after two weeks. It crept up a bit, but was still acceptable (just below 7). So now I don't worry about it.

I use this one, I am very happy with it.

Here is a link that might be useful: Milwaukee Meter

I use this one. It costs about $200 and it displays PH, ppm and water temp.

hydroponics.net you can get one for $20. Been using it for two years.