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by JshWright
3679 days ago
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An impeller driven pump moves a fixed amount of water per revolution. There are very few pumps on the market nowadays (even the super cheap ones) that don't have run-dry protection. In any case, no pump is going to catch fire running for 20 seconds. It is very common to add fertilizer to planted aquariums. It's dissolved in the water, and therefore makes no difference to the pump (it doesn't change the "pumping" properties of the water at all). |
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