Question

Pond have to clean what reaction
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Answer 1

Explanation:

The floating unit filters out weeds and debris, which are then pumped through a hose to an onshore filtration unit. Clear, filtered, aerated water then travels through a return hose to the pond. Meanwhile, the collected weeds can be discarded away from the pond, or recycled in a number of innovative ways

Hope it helps you...

Answer 2

Answer:

Ponds are natural ecosystems. They have decomposers or natural cleaners to decompose the wastes of all aquatic organisms. So it is not necessary to clean it.