Gravel is often dusty/dirty when it is purchased. Rinsing gravel helps prevent cloudy water when the tank is set up. Marine sand/gravel (other than “Live” substrates) virtually always requires a good rinsing.
Should I rinse the gravel before adding it to the aquarium?
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Always rinse everything that you put in the aquarium to clear dust/dirt/debris. By the nature of this question and answer i feel the need to clarify that you do not have to rinse the fish flakes.
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