Canadian tire TDS meter

[mike31154]

I ran canister filter for months with and without GFO (along with carbon) and couldn't tell the difference on my Hagen phosphate test kit. Maybe it's 'cause it's hard to read. The test result is never anything like the colour chart. Almost clear so I can only assume negligible to zero nitrates.... with or without GFO. Stopped running the GFO a month or so ago and no appreciable difference in algae growth. Still run carbon. My Chaeto grows well either way. So from my own experience, running GFO appears to have been an expensive proposition with no discernible benefit.

[mseepman]

The problem with Hagen tests kits is that they are Hagen Test kits. Being a Vernon reefer, we have nothing else to choose from unless we order on-line. I now run both the Hagen and Salifert and they don't get the same answers very often.

[Ripwoop]

Originally Posted by mseepman

The problem with Hagen tests kits is that they are Hagen Test kits. Being a Vernon reefer, we have nothing else to choose from unless we order on-line. I now run both the Hagen and Salifert and they don't get the same answers very often.

Interesting!!! how far off are the hagen test cause i use them too ( not much choice) could explain some stuff going on in my tank right now..Would you happen to have the KH test in hagen? how do you get dkh out of the readings? From what i understood from the back it says MG/L is ppm same thing..so under the saltwater peram's is says should be 105-125 MG/L. So, say you have it at the 125 MG/L, that is only 7dkh? little low no?

Rob