09-05-2009, 07:13 AM
Join Date: Mar 2008
Location: Seattle, WA
iTrader Positive Rating: 100%
| | Re: Looking for help on mixing dry chems
I would not add KNO3 at this time, the I use a target level for nitrates of 10 - 20 PPM so you are currently at the high end of the range. As your plants grow, the PPM level with probably drop and you can start dosing your KNO3 at that time.
You may not need MgSO4 at this time either. I would probably wait and see how the plants grow, watch for deficiencies, and then dose Mg when it is needed. If you tap water comes out with a KH and GH like your tank tested, and you do 50% water changes weekly, you may not need to add Mg ever! I wish my soft water was more like yours!
As for CO2, I would invest in an inexpensive "drop checker
" and mix of a 4.0 KH indicator solution to use in it. I find that it is the easiest way for me to monitor my CO2. I am not aware of phosphates affecting KH or PH readings.
Last edited by Seattle_Aquarist; 09-05-2009 at 07:45 AM..