Luckily, I hadn't scrapped the GH spreadsheet I put together yet. I just added a column that cut the manufacturers recommendation in half.
The totals are for 50 gallons, changing once a week, for a 14 week grow.
Column values are:
- Product name
- total amount per gallon (14 week total, in ml) as recommended by the manufacturer
- total per gallon, multiplied by 50 (total gal in system)
- half the recommended total, which is what most are dosing on average.
Basics:
- 3785ml/gal
- 946ml/qt
- 473ml/pt
For a single run, would need to buy:
- 1gal: micro, grow, bloom, Diamond Nectar, FloraBlend, Calimagic, FloraNectar
- 1qt: Liquid KoolBloom, ArmorSi
- 1pt: RapidStart, Floralicious Plus, FloraKleen
Doesn't take into account things like being able to use a jug of Diamon Nectar or Gro for two runs, but if you buy 2 quarts, you're paying for a gallon price anyway.
Now that is their full recommended line, and obviously you can get by with just the trio and some calmag. But there is a difference between just "getting by" and providing a full meal to the girls.