£8.99 inc. VAT
The Sera KH-Test (Carbonate Hardness-Test) is used to monitor the Carbonate Hardness levels within Freshwater and Marine Aquariums.
£15.49 inc. VAT
Silicate (SiO3) supports the growth of diatoms in marine and freshwater aquariums. The sera silicate-Test allows monitoring the silicate level reliably and easily. Silicate levels above 1 mg/l (ppm) should be bound with sera marin silicate clear (fresh and marine water).