It's not bad and gives you a mix of Fe chelators, which in the end of the Fe chelate experiment (and I will be posting my mix to it after another batch or so to play) seems like the best practice with all these different chelators. Which I think was our instinct already
But, three things:
1) Ferrous glucconate does not provide as much of a difference to CSM+B (EDTA chelated Fe) as DTPA chelated Fe in terms of chelator quality. AquariumFertilizer has that stuff (DTPA), too.
2) I am not sure of the teaspoon/tablespoon trials on AquariumFertilizer. Can you score a scale from some head shop or online or something?
3) Your plan is to adjust your dose of the mix as your plants need it, yeah? 5mL to 50gal of your mix is a nice fat Fe number (~0.18ppm Fe from CSM+B, ~0.1ppm Fe from the Glucconate if AquariumFetilizer.com is correct) under high light/uptake/a richly dosed tank. The problem is they both oxidize pretty fast so you may still need doses on the regular (see 1).
In terms of the rest of the micros in CSM+B, I find even leaner than 3) works better for me. I usually dose 0.1ppm Fe's worth of CSM+B traces every other day into my high light/etc tank and that's after years of dosing it pretty high (I think I peaked around 0.3ppm Fe's worth of CSM+B daily). I do love me some regular isolated Fe dosing, though. Actually, 5mLs of your mix into 100gal is pretty nice, too.
If you're down, I'll trade you your choice of 2 TBL of DTPA or EDDHA (or a TBL of each!) for the Glucconate so I can add it to my stash and measure. PM me if you are!