where to buy gH/pH/kH electronical tester?

[icefire]

hi all wondering where to find the item stated above... if possible pm me the location and price too! thanks!

[alvinchan80]

I think GH & KH can only be tested with liquid or test strip kits.. PH & TDS got electronic test pen and tester.. Most LFS sells them I think.. But GH & KH I think must ask the more seniors here in AQ..

[icefire]

I think GH & KH can only be tested with liquid or test strip kits.. PH & TDS got electronic test pen and tester.. Most LFS sells them I think.. But GH & KH I think must ask the more seniors here in AQ..

oic... but the test kit i bought for testing gh and kh doesn't show obvious results even though i've followed all the steps... might be its past its expiry date...