Dissolve 500 g in 3 L lukewarm RO water in canister 3, add Trace 3 (25 ml standard), fill to 5 L. Set the daily dose from measured KH use (20 ml/100 L replaces 1 dKH); test daily at first. Target 6.5-8 dKH. Bolus method: whole daily dose once, 30 min before lights.

• Some salt may stay undissolved at the bottom; this is expected

• Do not combine with kalkwasser or other carbonate/hydroxide/formate additives when using the Bolus method

• Dose apart from the Ca part (Mg, then Ca, then KH)

Carbonate mix uses a lower strength than Ca/Mg: 500 g per 5 L (100 g/L). Exact chemical composition is not published (product page lists no ingredients). Bolus method (Fauna Marin + Frag Farm UK): total daily KH dose as one bolus 30 min before photoperiod; change the bolus by max 5% (2% preferred) per step; test KH late in the photoperiod.