Veg+Bloom DOS B – Base Feed For Dosatron Systems

A two-part concentrate built for precision dosing at scale

Veg+Bloom DOS B is the second half of Veg+Bloom's two-part stock concentrate, formulated for growers running an automatic proportional injector such as a Dosatron. It carries the same base nutrition as the brand's one-part powders, split into Part A and Part B so each stays chemically stable as a concentrated stock solution rather than a ready-to-use mix. Used alongside Part A, it lets a grower keep a consistent feed running across a large number of plants without hand-mixing a reservoir for every batch.

Key Benefits

• Built for injector dosing – designed for use with a Dosatron or similar water-powered proportional injector
• High dilution ratio – a 1:100 stock concentrate treats large water volumes from a small stored quantity
• Stable as a stock solution – stays usable for 2+ weeks once mixed, provided it is covered and kept out of light
• Adjustable feed strength – the Part A ratio can be brought down from the maximum to fine-tune EC without touching Part B
• Consistent results at volume – removes the batch-to-batch variation that comes from mixing a full nutrient line by hand

Hand-mixing a full nutrient line for every reservoir becomes impractical once a grow scales past a handful of plants, and small measuring errors compound into uneven feed strength across a room. A concentrated two-part stock solution like DOS is designed to sit in an injector's feed tank and dose automatically as water flows, so every plant receives the same ratio without repeated manual mixing.

How to Use

• Mixing: Part B mixes at 240 grams per gallon of stock solution (Part A separately at 360g/gallon)
• Dilution: at a 1:100 injector ratio, 100lb of concentrate treats roughly 12,000 gallons of feed water
• Storage: keep the mixed stock covered and out of direct light; it remains stable for 2+ weeks
• Starting pH: mixed stock reads around pH 5.2 in 0 PPM/EC start water
• Recommended feed pH: coco 5.9–6.0, hydro 5.4–5.8, and it performs well in peat-based mixes with water hardness above 0.5 EC