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What one dose does
PARAMETER
1 ml / 100 L
Alkalinity
+0.1 dKH
To raise alkalinity by 1 dKH in 100 L: 10 ml.
How it’s used
Dose #1 and #2 in equal (or near-equal) daily volumes, guideline 5-10 ml each per 100 L/day. Set the #1 dose to replace measured daily KH drop (10 ml/100 L per 1 dKH/day); fine-tune from KH tests.
Cautions
• Dose #1 and #2 at separate, well-flowing spots; never mix the two parts outside the tank
• #1 can crystallize when cold: warm bottle to ~45 C; below 20 C dilute both parts 1:1 with RO so volumes stay equal
• Long-term use slowly raises salinity: periodically swap a little tank water for RO
Part of Essentials SPS
Sources
Inorganic-only KH source (higher pH than Mixed Reef). Also carries F, S, Fe, I, Se (no amounts published). ~3.6x classic Balling strength per ATI. German retailers say Essentials SPS was formerly 'Essentials+'; some US distributors list it under the old 'Essentials Pro' name/URL (see Essentials Pro entry).