Fluval Sea Hydrometer Food If the water temperature is:

If the water temperature is: cal

1ml will raise the Mg level of 100 liters (25gal) by 1ppm

and is adorned with decorative carvings

Sometimes this can form if your magnesium is on the high side

Fluval Sea Hydrometer Food If the water temperature is:Fluval Sea Hydrometer provides an accurate and convenient method of measuring specific gravity and salt level in marine aquariums. Regular testing is strongly recommended as stable salinity levels are essential for the health of marine fish and invertebrates. Compact and easy to use, the hydrometer can be permanently installed inside the tank for continuous readings. Its slim, low profile design camouflages well inside the tank and will not diminish