How to Raise pH and KH in a Fish Tank
At a Glance Test KH first, because low KH is usually why pH is low or keeps dropping. Most community tanks sit happily at pH 7.0 to 7.8 and KH … Read more
How to Lower pH in a Fish Tank (Safely)
At a Glance Most fish cope with a pH up to about 7.8, and some sources say anything under 8.5 is fine, so many tanks don’t need lowering at all. … Read more
What pH Should a Fish Tank Be?
At a Glance Most freshwater fish do well between pH 6.5 and 8.0, and a steady reading matters more than an exact number. Aim for what your species prefers, and … Read more
How to Lower Hardness and Alkalinity in a Fish Tank
At a Glance Check whether you need to first, since many fish cope with a wide range. If you do, blend your tap water with RO, deionised or distilled water … Read more
What Are KH and GH in an Aquarium? (and How to Adjust Them)
At a Glance KH is carbonate hardness, the buffer that holds pH steady. GH is general hardness, the calcium and magnesium your fish and plants use. Most freshwater community tanks … Read more