0 tds and po4

sprite

Member
is this possible? i have been battling a hair algea issue and decided to check my ro/di water for the the fun of it. in my storage container i got a reading of .1, so i decided to check coming right out of the hose and got .05 po4. is it time to change my filters?
 
I don't believe the phosphate readings if the TDS is correct. Is that with the Hanna meter? Or a kit? Does it ever read 0 phosphate??

0 ppm TDS Ro/DI water is not a significant source of phosphate. Fish food has loads of phosphate and that is likely where the nutrients are coming from. :)
 
seachem kit.... after i made some saltwater out of my jug that tested .1 i retested my newly mixed water and got zero for po4 with the same kit
 
OK, glad that confirms it. :)

Well, that will depend on the test kit, but certainly I don't believe this measurement.


seachem kit....



I knew it was the Seachem kit from your earlier post. I just did not want folks to read your post and assume that I thought that all test kits for all parameters read incorrectly in DI water. That is not the case. But certain kits for certain parameters may well need the alkalinity or other attributes that seawater provides to give an accurate answer. :)
 
Please permit me to tag along... Randy - is your statement about fish food containing lots of phosphate true of all foods? Pellets better or worse than flakes? I'm assuming that the fish stew I made and froze using fresh fish and shrimp and clam is okay? I'm sure there's a thread on this somewhere, but it doesn't come up for me. Thanks
 
It is necessarily true of all foods as phosphorus is an important component of proteins, DNA, RNA and phospholipids, among many other biomolecules that are present in all living organisms that later become fish foods. Certain fresh, frozen and canned seafoods from the grocery store also can have added phosphate that helps keep moisture in the seafood so it looks fresher.

As to which foods have more or less phosphate, I know the answer for many foods that people eat, but not so much for fish foods, where one would need to relate it back to the amount of nutrients of various sorts also present, like the protein to phosphorus ratio, etc. I've not seen that sort of info.
 
Thanks, I guess I just need to feed less perhaps... Those triggers are very skilled beggars though.
 
Back
Top