Hey Sparky007. I added AquariumFertilizers MacroMicro Mix to http://calc.petalphile.com
This guy is tricky since there's no information on their site, so I figured I'd explain how I did it.
First, let's assume by "equal parts" they're using volume, because almost everyone who says "parts" means volume. This would be doing something like adding 1 cup each of KNO3, K2SO4, MgSO4, and Plantex CSM+B into some bag and then shaking it up. Lets assume the mix gets evenly distributed.
Now lets pull a teaspoon out of that bag. That teaspoon will be 1/4 teaspoon KNO3, 1/4 tsp K2SO4, 1/4 tsp MgSO4, and 1/4 tsp Plantex CSM+B, of course. Such a teaspoon will weigh about 5.25 grams.
However, the mass of each of the compounds will be different and not 1/4 of the total. (KNO3, K2SO4, MgSO4.7H2O, and Plantex CSM+B all have different densities.) If we took each one of those 1/4 teaspoons, we'd actually have a mass like this:
volume mass (mg) mass (%)
PlantexCSM+B 1/4 tsp 1075 20.5
KNO3 1/4 tsp 1300 24.8
K2SO4 1/4 tsp 1600 30.5
MgSO4.7H2O 1/4 tsp 1275 24.3
total 1 tsp 5250
Now we have mass percentages, so the rest is easy. (All the % we know and love from our fertilizers are calculated by mass percentage, and so we have to speak apples to apples before we convert it.)
Lets look at all the nutrients of our MicroMacro Nutrient mix. Whats the percentage of each nutrient from each bit of the mix?
We then take all those bits and add them up.
AF's MacroMicro Mix:
(I was rounding in the scripts above for the purposes of the thread. This guy does 3 significant figures at the end of all calculations)
Now lets check out what happens with 3 grams of that stuff into a 20gallon tank.
I'm not really down with this stuff, fwiw. I think the lack of PO4 and in particular the proportions make it smarter to roll your own mix.
Please correct me!