ducati Posted July 19, 2007 Report Share Posted July 19, 2007 I know this is a stupid question but what role do they perform - how necessary are they? Quote Link to comment Share on other sites More sharing options...
David R Posted July 19, 2007 Report Share Posted July 19, 2007 There has been plenty of discussion on sumps recently. http://www.google.com/custom?domains=fn ... 1%3B&hl=en Quote Link to comment Share on other sites More sharing options...
ducati Posted July 19, 2007 Author Report Share Posted July 19, 2007 Thanks for that - after my question I did go and do some research. Will read your sites. Quote Link to comment Share on other sites More sharing options...
ducati Posted July 20, 2007 Author Report Share Posted July 20, 2007 OK so here is another (probably stupid) question. Why wouldnt you use a biological filter made for a pond? eg a small fishmate or something? Quote Link to comment Share on other sites More sharing options...
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