Cheers Mark, Next time I go up there, I will ask for some RO water, test it, then test it 3/4 weeks like you said and see what I get.
Cheers for letting me know your routine about the prime and RO.
Also that's exactly what I thought regarding water changes, as 50% with hard water is going to bring bigger changes than the 10-20%, the good news is I did some tests today, its like the water change never happened.
TDS back down to 175, was 170 before water change. PH is 7, GH 7, KH 2-3. Nothing has hardly moved. So with in 24 hours, its all back to how it was. The TDS only increased by 20 anyway after the water change. So I guess the changes were minimal with all parameters. When the Ebi Gold does stop buffering I also hope the increases there will be slow as well, so fingers crossed all around.
Yeah I just got confused as Dane said I don't need test both, I did some looking into this as It sounded familiar when he mentioned that, I looked in my bookmarks and found this from plantedtank which someone posted:
TDS is a total of all things dissolved into the water. IE, fertilizers, trace minerals and salts. That includes your GH and KH. If you were to test just GH and KH, they're 17.9 ppm per degree. So 179 GH and 0 KH would be 10 GH
So if you know your GH and KH, just multiply by 17.9.
So if you know your GH is 10, and KH is 0, and your TDS is 250, you know that only 180 TDS of that is GH, the other 70 TDS is other things in your water such as nitrates, potassium, phosphate, etc.
I did the maths.... GH 7 x 17.9 = 125TDS KH 3 x 17.9 = 53TDS put them together I got 178, My TDS is lower than 178 so the method above has to be incorrect and also considering there's minerals and salts to take into account etc. So I presume one cant just use TDS to tell there GH etc. Unless you ignore KH and just use GH as I also read GH does include KH as-well, so 125 TDS is my GH, and the remaining 50 is trace minerals, salts, nitrate, organic waste etc.
Thanks again for helping.
Cheers for letting me know your routine about the prime and RO.
Also that's exactly what I thought regarding water changes, as 50% with hard water is going to bring bigger changes than the 10-20%, the good news is I did some tests today, its like the water change never happened.
TDS back down to 175, was 170 before water change. PH is 7, GH 7, KH 2-3. Nothing has hardly moved. So with in 24 hours, its all back to how it was. The TDS only increased by 20 anyway after the water change. So I guess the changes were minimal with all parameters. When the Ebi Gold does stop buffering I also hope the increases there will be slow as well, so fingers crossed all around.
Yeah I just got confused as Dane said I don't need test both, I did some looking into this as It sounded familiar when he mentioned that, I looked in my bookmarks and found this from plantedtank which someone posted:
TDS is a total of all things dissolved into the water. IE, fertilizers, trace minerals and salts. That includes your GH and KH. If you were to test just GH and KH, they're 17.9 ppm per degree. So 179 GH and 0 KH would be 10 GH
So if you know your GH and KH, just multiply by 17.9.
So if you know your GH is 10, and KH is 0, and your TDS is 250, you know that only 180 TDS of that is GH, the other 70 TDS is other things in your water such as nitrates, potassium, phosphate, etc.
I did the maths.... GH 7 x 17.9 = 125TDS KH 3 x 17.9 = 53TDS put them together I got 178, My TDS is lower than 178 so the method above has to be incorrect and also considering there's minerals and salts to take into account etc. So I presume one cant just use TDS to tell there GH etc. Unless you ignore KH and just use GH as I also read GH does include KH as-well, so 125 TDS is my GH, and the remaining 50 is trace minerals, salts, nitrate, organic waste etc.
Thanks again for helping.
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