Vendeur: pro-shrimp (13.740) 99.9%, Lieu où se trouve: New Houghton, Lieu de livraison: Worldwide, Numéro de l'objet: 252268908762 Type: Test Kit, Test/Treatment Parameter: GH, Water Type: Fresh, Brand: JBL, Les Détails: Pro Shrimp's comment: Liquid Test Kits are more accurate than the common test strips and enable you to do more tests per package. GH is one of the most important parameters for shrimp. GH determins General Hardness of your water, essentially the mineral content. This is the refill package! Recommended value for fresh water: 8-20 °dGH1 drop = 1 °dGH.Colour transition from red to green.A higher GH in the aquarium compared to that of tap water suggests that water was topped up rather than renewed!