Collection: Reef Crest Additives

Reef Crest supplements alongside bulk reef chemistry. Parts A, B and C handle calcium, alkalinity and magnesium, while the bulk listings offer the raw salts by themselves — calcium chloride, sodium carbonate, sodium bicarbonate, calcium hydroxide, magnesium chloride and magnesium sulfate — with a small and a large package for each. Run a test first and change only one value per session, since calcium, alkalinity and magnesium in a reef system are linked and shift together.