tds

does any kind of tds work for testing water or do i need a specific one?

 

I would say any tds meter will work.

 

i am looking at some of the tds on ebay, since i got ur attention here, i borrowed my friend tds and measure my ro water it was around 20 the first time i test out of the container, and then when i test it come out of the hose is zero, i got a layer of green film on the glass since i sat it right next to the window would that be the cause of the sun or would it be the lighting problem? i use 50/50 light 130w pc light bulbs made by blueline

 

What tank is growing a green film on the glass? Tds meter is just to measure the water that your ro is making not to measure your tanks saltwater.

Are you mixing your water right inside the fish tank?

 

i use it to measure my ro water in the holder, my display tank growing a layer of green algea, just in the front panel not the back panel

 

any name brand?

 

Any will do, The one I have I got free in a special offer a while back, so go figure.You can find one for around 20 bucks.

 

i wonder if you may have sunlight shining on the front pane of glass.

 

standard tds meters work on freshwater for the average consumer. and any brand will work. the higher end tds meters that measure any liquid mainly in labs cost way to much for the average joe.