01-29-2014, 11:01 AM
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depends on how efficiently your biological filter is working, and the size of the colony in comparison to the stocking of the aquarium,along with what type of filter being used.many breeders only use sponge filters or no filters at all and rely on large regular water changes.generally 100% water changes every 4-5 days.if you are using large,efficient filters,you can get by on smaller less frequent water changes.50% once a week will work fine.i have 2 canister filters set up on my goldfish tank.the first one is set up as a biological filter.it has a sponge prefilter to keep out as much detritus as possible,and filled with lots of media to colonize large amounts of beneficial bacteria, i clean this filter about 4-6 times a year,more if i notice the flow rate lowering.i clean the sponge prefilter with every water change. the second is set up as a mechanical filter.no sponge prefilter.this allows it to take up the vast majority of detritus.i position the spray bars to channel the detritus toward this filter.this filter is cleaned regularly,every 2-4 weeks, to get rid of mulm and solid wastes.i rely on water tests to tell me if/when my filter should be maintained. i use sponges of varying pore sizes and a filter floss for polishing the water.neglecting the mechanical filter can hazardous to your stock.ammmonia spikes will be the result of build up,along with compromised flow rates.
Last edited by sandybottom; 01-29-2014 at 11:03 AM..