When dosing dry nutrients such as KNO3, how do you measure a "tsp" ?
When talking about liquid, measuring a tsp is easy. But when you guys say a tsp for a powder, do you mean it is supposed to have the same volume as if it was liquid ? Or do you put as much powder in the tsp as possible ? Or something in between ?
In other words, how do you guys measure dry nutrients ?
The Chuck's Planted Aquarium Calculator warns that measuring with tea spoons is not accurate. Does anybody here use a more reliable method ? Do you recommend I buy a balance to measure grams ? Where could I find them ?
The reason I am worried about measuring tsp is because I used that calculator (very nice btw) to add NO3 to my tank because my indicator (Red Sea) was marking zero (new tank - 46G, no fish at all). I added 10 tea-spoons of KNO3 in a 200ml stock solution. Chuck's Calculator tells that each ml of that solution would add 1.14ppm Nitrate in 40 galons of water (my estimated true water volume). I then added 5 ml of that solution in my tank. Next day I measured but Nitrate was still zero !
Then, to make sure the indicator was working, I measured the stock solution and it was saturated with Nitrate - as expected.
Then I added more 5 ml of the solution to the tank. 30 min later the tank water still has zero Nitrates !
Anybody has any idea what's going on ? Is it possible the plants are absorbing nitrates that fast ?
C02 = 17ppm, 0.96bps
KH = 65ppm
PH = 6.8
As you can see I am totally confused now and even suspicious about how I should measure a tsp. I beg for any help as algaes are slowly starting to appear (fuzzy and thread) ...