how do you measure the Phosphate levels and DOC (dissolved organic compounds) ???

[Bubble_B0y]

I do weekly water changes on my tank.
But I would like to monitor the phosphate and DOC levels in the tank - to ensure i'm doing sufficient water changes.

Is it possible?

would a protein skimmer eliminate phosphate and DOC altogether?

 

[jetajockey]

You can buy a liquid phosphate test kit and battery powered TDS meters are pretty cheap, I got one off ebay for under 5 dollars.

 

[Bubble_B0y]

cool.
I have the API master test kit. But it didn't come with phosphate.

kudos!