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.
Tropic Marin Nitrite-/Nitrate Test For the determination of the nitrite and nitrate concentration in freshwater and seawater. Nitrite (NO2-) is the intermediate stage of the aerobic nitrification and is highly toxic for fish and...ONLY$23.49