The crystalline surface of a vibrant aquarium or pond hides silent threats underneath. Water quality stands as the key element for aquatic ecosystem health, so periodic testing is essential to protect what seems perfect underwater. Proper aeration, like that provided by Oase Pond air pumps, helps maintain oxygen levels, but testing is the only way to detect hidden toxins. The pond care expert That Pond Guy provides trusted guidance for novices and experienced pond hobbyists alike. The Hidden Threat of Ammonia and Nitrite The gills of fish emit ammonia that builds up as toxic waste through their bodily processes. Aquariums…