That is not really true. The detritus has been stripped of any viable nutrition when it gets into the sand and is a long way from fish poop.
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One must be careful stirring anything up. I use a canister filter used to vacuum out my aquariums. I also use a DE filter also to keep the water column clean when does this. Cleaning is not a bad thing you just need to be cautious when doing it. Thru the years I have seen so many people crash their tank after simple water changes and stirring up the sand bed and having done it my self. I had to learn to be very careful when doing tank maintenance going forward.
Placement of powerheads as well as amount of flow would have to be perfect IMO to not have anything settle. IMO, probably unrealistic[emoji6]I am of the opinion that if there is anything to stir up at all then maybe flow is on the low side? Whenever I glue something down in my tank I wave my hand over the location a few times to make sure nothing is there and usually all I stir up is heavier things like grains of sand.
But, I am now not skimming and instead have a large refugium. Considering the bacteria and pods in my 'fuge I would never stir it up. I don't want to risk lowering the number of critters or bacteria in the fuge at all considering it is my main filtration.
I do blast my weir/overflow once a week with a powerhead, it stirs up a lot of crap but I haven't seen any change in corals after doing so.
Placement of powerheads as well as amount of flow would have to be perfect IMO to not have anything settle. IMO, probably unrealistic[emoji6]
I think that your main issue with tank crashes is that you don’t frequently stir up the sand bad or detritus enough because over a long period of time it can build up and once released all of that excess detritus, that had been built up, rapidly ruins the water quality and causes spikes in nitrates and that is what I believe is the main cause of your tank crash experiences.
Thanks for bumping this up! This is a cool discussion!I run a bare bottom tank I have 2 jabao pp20 on the back corners to clean everything under the rocks that accumulate. I do get feeding responses out of the corals when do so for 10 mins per every other day. That is when I dump in my benereef food for corals.
I guess that depends. Stirring up a sand bed that has been sitting unattended for years could definitely cause some horrendous problems but if it’s continually maintained/stirred that won’t be a problem.I wouldn't do this in fact I have found that it can cause a tank wipe out. You can stir up bacteria that will kill the corals. Found this out years ago when I tried this method. Now I vaccum the bottom and use coral foods. Cost me too much in coral loss to do this.
That's probably true for the ocean. Fish that eat polyps are grazing in day time, that's another thing making polyp extension more common at night on a reef.I was going to post a thread as I had read in a book once about this. Decided to google it first. Reviving a dead thread but current input is welcomed. I read that it should be done at night as SPS are in feeding mode then - when the little things in the ocean tend to come out more. Anyone do this at night? I tend to blow my rocks off during the day because of my own schedule. Wondering if there’s any evidence of this, anecdotal or not.