XL Red and white Comet 20-24cm bubblemagus the hydrometer can be permanently

the hydrometer can be permanently installed inside the tank for continuous readings

Simply add fresh water

8¼” × 4¼” × 3½” 210x110x93mm

1ml per 100 litres to raise 1ppm of Magnesium

Unlike common goldfish

XL Red and white Comet 20-24cm bubblemagus the hydrometer can be permanentlyOverview Family: Carassius auratus Pond Goldfish are hardy, active fish well suited for outdoor living in well maintained garden ponds. Known for their vibrant colors, graceful swimming, & social nature, they thrive in cool, oxygen rich water with plenty of space. These goldfish are excellent for beginners & can coexist peacefully in groups or with other non aggressive pond fish. With proper care, they can grow large & live for 1020 years or more,