Originally Posted by LindaC
I ended up adding 1 tsp of baking soda to my tank the other night which brought my KH up from 50 to 80, my PH from 6.5 to 70, so now according to chuck's calculator, with KH at 4.46 degrees, I am getting perfect CO2 at 13.38 ppm, if I read it correctly.
The needle valve on my new Milwaukee seems to be holding the bubble rate where it left off at the night before, so all seems well, do I dare to assume...
Now, to keep the KH where it is, would I continue to add 1 tsp of baking soda with every 50% water change or would I only add 1/2 tsp? Prior to regulated CO2, I was doing 2 50% water changes a week, I don't want to do that anymore, once is more than enough!
What causes the green algea on the glass, the kind that wipes right off, not the spot algea. I seem to find a little of this on my glass every night when I get home from work, but not as much as when I add KNO3, I stopped adding that to my tank, a day after I'd dose it, my glass would be all green.
Like rex said, it seems that adding once after a water change is all one will need. Something inside the tank which plays with kH is another thing though (like some corals) but generally kH number will not budge at all after that long week.
If the kH and pH measurement are correct, I kinda agree that you need to up the level of CO2 you are injecting. Try increasing the bubble rate first. Btw, what kind of diffusor/reactor you are using? Might not be sufficient for the tank size....
About those extra algae when you add NO3 :
1. You add too much KNO3. Try giving in smaller amount every 2-3 days instead of bigger dose every 3-4 days.
2. Something is missing.... like P, K, trace and Fe. Try to balance it right.
3. Do not rely too much on the calculator, it is a very good guide but not a special dosing meter for your personal tank. Every tank is different as I find out myself the hard way.... tank size, bio load, plant load, water parameter from tap, etc.