Water Test KitsUsing test kits to detect problematic water conditions is key to the sustainability of a healthy aquarium. For a fish-only tank, you should measure and monitor pH, alkalinity, ammonia, nitrite, and nitrate levels. In addition to these, you should also monitor the calcium, magnesium and strontium levels in a reef aquarium.
Use the Tropic Marin Precision Hydrometer from Pet Store to accurately measure the density of your aquarium. This instrument can also be used to measure the specific gravity of liquids. Using this hydrometer will give you precis...ONLY$38.70