The free tools are genuinely useful on their own. Pro unlocks the full solver bundle with persistence. The reservoir add-on is for growers who recirculate.
Acquisition hooks — the commodity converters, plus one real solve.
Funnel position, not math complexity.
Start freeThe full multi-salt recipe solver bundle, with persistence.
The paid conversion moment.
Go ProReservoir management & stock-injector scaling for recirculating setups.
Subscription if you recirculate; otherwise a one-time unlock.
Add to ProAll safety warnings (stock incompatibility, chelate–pH matching) and approximation caveats are free and always visible, on every tier. They travel with their feature into whatever tier it occupies.