CATDOLL : CATDOLL: How to raise seafood well

How to raise seafood

It is not easy to keep fresh seafood alive in a hotel. Water temperature, salinity, number of water changes and mixed breeding are all matters of concern. Before introducing the water temperature, salinity (the number of grams of salt contained in 1 kg of seawater is called salinity) and taboos for keeping some seafood species alive, let us first see what are the necessary items for keeping fresh seafood alive in a hotel?

1. Thermometer - measure the water temperature of the seafood pool.

2. Seawater concentration meter (also known as salinity meter) - monitors the salt concentration in the seafood pool.

3. Thermostat – provides heat energy.

4. Oxygen pump - produces oxygen for a single seafood pool.

5. Circulating water equipment - makes the water in the seafood pool circulate up and down, left and right, and naturally oxygenates during the flow.

6. Refrigeration equipment - lowers the water temperature in the pool.

7. Filter net - filter impurities from pool water.

Water temperature, salinity, survival period and feeding methods of common seafood species:

Australian lobster: The water temperature is 12-15℃ in summer and 18-19℃ in winter, and the salinity is 24-26%. Lobsters can generally survive for a week. If the water is not muddy, the water can be changed every three months. Because Australian lobsters are vigorous and active, it is best not to raise them together with other seafood except crayfish.

Small green dragon (crayfish): water temperature 17-18 ℃, salinity 24-26%, generally can survive 3-4 days. Can be mixed with lobsters.

Turbot and knife fish: Water temperature is 18-19℃, salinity is 16-18%. They can be fed for up to 15 days, and the water should be changed once a week. The two can be raised together.

Flower crabs, Dungeness crabs, swimming crabs, and roe crabs: water temperature is 17-19℃, salinity is 23-24%, they can generally survive for 7 days, and all crabs can be raised together.

Clams and razor clams: water temperature 13-15℃, salinity 12-15%, can survive for about 5 days, generally fed with flowing water, and there is generally no taboo on mixed breeding of these shellfish, but because of their small size, they are placed separately.

Sturgeon, longspined fish, river shrimp: water temperature 12-15℃, salinity 0. Since sturgeons are more aggressive, they need to be fed alone, while other species can be raised together.

Prawns, mud shrimps, snail shrimps, and grass shrimps: water temperature 18-19℃, salinity 16-18%, can survive for 1-2 days at most. Since shrimps can easily deteriorate the water quality, the water must be changed every other day. If dead shrimps are found in the pool, they must be removed immediately. Since the hotel feeds them in large quantities, they are generally fed individually.

Left-mouthed fish: The water temperature is about -2℃, the salinity is 24-25%, it can be fed for up to 15 days, and the water needs to be changed once a week.

What is the best water temperature for crab growth?

The most suitable water temperature for river crabs is 25 degrees. In winter, it is generally necessary to build a greenhouse and keep the water temperature at 12 degrees.