It is easy to convert a planting cement long-sink into a temperature-adjustable fish and crab pond, but a mesh cover must be covered to prevent fish and crabs from running out of the pond. This kind of pool has no connection with seawater and is not affected by seawater pollution. The safety of aquatic products in the pool is guaranteed. The fertilizer mixer can be used to mix food for fish and crabs, while the oxygen generator adds oxygen to the pool.
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