Hello everyone,
Couple of quick questions.
I have a DWC in an 18 gallon rubbermade that I'm getting ready to start my grow in and I have yet to see how people check the PH and PPM of the grow without exposing the root area to light.

Do most people use a small hole in the lid that they cover and dip a stick down like checking oil?
Do they use an eye dropper to remove a sample and test that?

I have seen setups where a clear plastic tube is sticking out and straight up to show the water level but this water would then be exposed to light and cause algae right?

Thanks in advance for any help offered.
meltface Reviewed by meltface on . Couple of setup questions Hello everyone, Couple of quick questions. I have a DWC in an 18 gallon rubbermade that I'm getting ready to start my grow in and I have yet to see how people check the PH and PPM of the grow without exposing the root area to light. Do most people use a small hole in the lid that they cover and dip a stick down like checking oil? Do they use an eye dropper to remove a sample and test that? I have seen setups where a clear plastic tube is sticking out and straight up to show the water Rating: 5