reef salt ARKA Premium 1 kg fast dissolving marine for stable aquariums boosts coral growth, colour & health phosphate/nitrate free ideal RO water sensitive corals

High-purity synthetic reef salt for marine aquariums – fast dissolving & residue-free – designed for optimal coral care, stable parameters & vivid colours – trusted by reefers, beginners & pros alike. Ideal calcium-magnesium-strontium balance for coral skeleton formation, polyp extension & colour intensity – supports LPS, SPS & soft corals with lasting reef health & resilience. Clean & consistent formula – phosphate- & nitrate-free – promotes biologically stable water conditions without nutrient spikes – perfect for demanding reef setups & sensitive species. Precise values: 37 g/l = 1.022 SG – pH 8.3–8.5 – KH 8–10 – Ca 430 mg/l – Mg 1300 mg/l – perfect for RO water use – no organics, no heavy metals, no unwanted residues. Lab-tested quality by ARKA – long-term reef performance with consistent batches – trusted by aquascapers, coral breeders & advanced hobbyists – for safe & successful marine aquarium keeping.