they appear to be rinsing only 1/2 of their media (sponges) in tap water. So yes, they might be killing 1/2 of their beneficial bacteria if they have chlorinated tap water.Wont tap water kill the bacteria?
It could kill some, yes...but think of it this way; if the sponge is regularly cleaned in this manner, the bacteria never really get established on the sponge and colonize elsewhere. There are plenty of places for these bacteria to colonize (on the substrate, driftwood, rocks, other equipment and filter media that aren't cleaned in tap.) Having plenty of live plants makes a difference, as well. I've never seen a mini cycle in all the years I've done this. Keep in mind that I also run multiple filters on all my tanks so there is very little chance of the biofilter getting compromised in any way so as long as the tank itself isn't contaminated.Wont tap water kill the bacteria?
I clean all my stuff in the bath tub under running water. Cleaning a filter does not remove a great quantity of bacteria unless you have a bare bottom tank. It's not like you scrub them spotless. Just get the worst of the crud off.
If any of may tanks jump into a minicycle just from cleaning a filter, that tells me I haven't been cleaning them often enough. By the same token, I am a bit anal about my maintenance as I have no excuse not to keep my tanks clean and sparkling.
wha???
am i the ony one who sees a major flaw in this?