pH is one of the parameters that is important in a marine aquarium, and is therefore checked regularly. It could be that the pH is lower than the aquarist desires. There are a few things that can be checked and tried. This may raise the level sufficiently.
The first move is to consider at what time of day the water test was undertaken. If this was shortly after the lighting turned on, the low reading may be because during the night there is a tendency in some systems for the pH to fall. Therefore carry out a further test say an hour before the lights turn off. The pH may well measure higher. If desired, algae (Caulerpa) can be planted below the display aquarium and lit on an opposite cycle to the display aquarium. This will help counter the pH drop.Read more →