Coralife Deep Six Hydrometer Under Gravel Filter this product is not crushed

this product is not crushed at all

Antibiotic and hormone free

Made in Europe

these 6 mm floating pellets are ideal for medium to large koi and large non-fancy goldfish

Coralife Deep Six Hydrometer Under Gravel Filter this product is not crushedDeep Six Hydrometer The hobbyist can take a water sample at six inches in depth without submerging their hands in the water, thus avoiding the possibility of contamination. Samples taken at six inches in depth have been proven to give a more accurate salinity reading than surface samples. Every unit is calibrated and tested for accuracy using advanced testing procedures. With its durable construction and easy to read scales, the deep six is guaranteed