UIUZMAR Water pH TDS Meter Pen, pH EC Meter Hydroponic, Test the pH TDS Value of Aquarium, 4 in 1 pH/EC/TDS/Temp Meter Digital Water Tester for Drinking Water, Pond Water, Hot Tub, Swimming Pool

works lovely, see ec temp and ph all at once, fast post, thank you.

Very good pen

Excellent meter but its shame it doesn't include a nice red hanging cord. That was quite disappointing.

it is very good giving a better read out than using test strips ,my tanks have modern substrate which tends to make the ph of the water very acid below 6.5 and the test strips were not very accurate , using this I can adjust the ph better I use bicarbonate of soda keeping the water at about 7.5 or just under ,also you can check the temp and tds

Great ph,tds,ec meter very accurate recommend

My product-PH pen has arrived cracked and does not work. Can’t even get a refund!

Very good.

So far so good. These have never lasted a couple of growing sessions and needed replacing the Ph function always goes so I hope this one is better.