Posts Tagged nutrient-removal

Why Is There Scum On The Water Surface

A couple of days ago we received an email from a young man who has just started out in this hobby and has setup a small salt water aquarium.

He was very apologetic for contacting us but had noticed that there was a large build up of what appeared to be scum on the water surface and was hoping that we would be able to help him find out what it was, is it detrimental and how does he remove it.

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