ducati Posted March 2, 2007 Report Share Posted March 2, 2007 If I am using an external filter (eheim) do I need any other form of aeration for my tank - how close to the surface should I have the outlet? Quote Link to comment Share on other sites More sharing options...
alanmin4304 Posted March 2, 2007 Report Share Posted March 2, 2007 Aeration increases the surface area of the tank and allows you to have more fish and can help circulate the water to even out temperature etc. If the tank is not heavily stocked with fish it is not realy required but in some circumstances would be advisable. E.G. I have a tank in a cabinet which is aerated to keep fresh air above the water as it is pretty well sealed otherwise. Quote Link to comment Share on other sites More sharing options...
ducati Posted March 2, 2007 Author Report Share Posted March 2, 2007 you are up early too!! Does this apply to outdoor pond as well - what is more important - filtration or aeration? Quote Link to comment Share on other sites More sharing options...
alanmin4304 Posted March 2, 2007 Report Share Posted March 2, 2007 Most outdoor ponds are not aerated. If they are designed right they will have a good surface area for the volume of water. Quote Link to comment Share on other sites More sharing options...
ducati Posted March 2, 2007 Author Report Share Posted March 2, 2007 I recently went to a goldfish breeders place and he had a huge number of fish in a very small space. There was plenty of water flowing - so in this sort of intensive operation is it the filtration or water movement thats important? I guess the key is water quality and my questions are about attaining that? Quote Link to comment Share on other sites More sharing options...
alanmin4304 Posted March 2, 2007 Report Share Posted March 2, 2007 When you are breeding large numbers of fish it becomes a matter of economy of scale and you have to rare as many fish as you can in a facility to cut costs. Filtration removes the lumps and provides housing for bacteria to operate the nitrogen cycle but doesn't get rid of the solubles. Generally breeders will feed to excess and water change as much as possible to get maximum growth. That is what I used to do anyway. Quote Link to comment Share on other sites More sharing options...
ducati Posted March 2, 2007 Author Report Share Posted March 2, 2007 Thanks for you help on this and sorry for so many questions. I have a couple of big plastic tanks outside (about 600L each) - I want to raise as many baby goldfish in them as possible until I build my new pond. What will I need to do this? As I said I couldnt believe how many fish this breeder had in such a small space - and they all looked fine. Quote Link to comment Share on other sites More sharing options...
alanmin4304 Posted March 2, 2007 Report Share Posted March 2, 2007 Lots of water changes and kull all but the very best stock. The best food grows the best fish. Quote Link to comment Share on other sites More sharing options...
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