These aquarium maintenance charts are available for download and will hopefully assist in the methodical testing of the seawater, the timeous changing of lighting and filter medias, and also offer a means of keeping track of aquarium livestock additions.
The Test Chart: this of course is very easily adaptable to a fish only system by using only the tests that are applicable.
By using a test chart and testing routinely, the aquarist can see that the seawater parameters are stable. On the other hand, any trend, such as falling calcium levels, changing pH etc can be spotted. Trends often show up, allowing the aquarist to accurately calculate, for example, the amount of an additive that is required at intervals.