The PH levels in your aquarium can fluctuate, and this can cause problems as a result of either overly alkaline or acidic water which can be extremely harmful to both your fish and aquarium plants.
Many factors such as fish waste as well as the addition of tap water can cause PH level fluctuations.
With that in mind, at Swell UK we stock a great range of PH test kits from trusted brands including API, JBL and Red Sea all of which are bought to you at great value prices!