So here is the full story; I was looking for a way to dose P using items that I can find locally. I was directed to look into Fleet. I went ahead and picked some up after my first night of work on this rotation (so after being up all day then working a 13 hour shift I had been up for ~ 29 hours) when I started to try and figure out the conversion and amount to add of the Fleet to raise the P levels to 0.5ppm. That is what I was shooting for.
After sleeping I have been able to try and figure out how much P I actually added.
Fleet contains 19g in 118ml of solution of P (Monobasic) so if my conversions are correct 1ml should contain 0.16g of P. I added about 59ml of solution straight to my tank. Again hadn’t slept in a while and thought “19g, that’s nothing for a 55g”. About 9.44g of P should be the total that was added.
If you look at Rex Griggs site*, he states that for KH2PO4, “¼ teaspoon (1.2 grams) will add 12.86 ppm of phosphates to 20 gallons of water.” That being said 0.3g should give the same reading for 5 gallons of water. To get a reading of 12.86ppm in a 55g I would have to have added 3.3g. Since I added a bit more than the 3.3g (9.44g) I believe that my reading were correct.
I went ahead and did back to back to back 50% water changes this morning as well as added a bag of seachem organic and phosphate absorber. I will only leave this in the tank until I am able to get the P back under control.
I have brought a new sample to work with me tonight and will be testing again.
As a note on the sticky, I have read it over twice and will be reading it again tonight to make sure I did not miss anything, although it gives great info about dosing it does not go into any detail as to when you cannot get pure chemicals or choose to use local chemicals.