Not that much no. I had quite a few bubble algae on one and the foxface cleaned that in one day.
I had to remove a barnacle shell that was all green from algae and dip it in javel water for a day in order to regain its colors but I don't have to do that with the sponges.
They seem to be a little less vibrant in color or less saturated than before but that in my taste is better anyway, looks more natural. So far I have them for 8 months and I have not clean those sponges yet. It seem that algae don't have much hold in that type of material.
I would suggest oxyclean to clean them and a little brush or dipping it for about a day and of course a very throughout rinse.
Here is a video done recently and you can see the sponges. As you can see I have lots of algae on my back glass but none on the sponges. I have since added 2 blue sponges on the left.
http://www.youtube.com/watch?v=Mv2G0...yer_detailpage
Quote:
Originally Posted by don.ald
is it a lot of work to keep them clean?
dont they get covered in algae?
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