A. HOB sucks because it does not remove solids from the bottom
no offence sir but, really? every filter comes with a auto gravel cleaner. Its you. there is nothing you can get to clean your gravel for you. putting a power head in will just make current your fish will not like and it will accumulate some ware in the tank. Do the vacuuming at water change and clean your ac sponge once a week.Admittedly, I am kinda lazy with WCs.
I have a 29g with HOB filtration. I used to change the filter and 5 gallons, once a month (I know, shame on me, but tank is lightly stocked) Used a gravel vacuum to get some poo off the bottom (light gravel)
Last time I changed the filter, I noticed the flow was poor, the intake tube was full of gunk, filter caked with gunk. It occurred to me that after topping the tank, much solids were still in suspension in the water. No wonder the filter quickly gunked up, probably in the first 12 hours. Brand new filter, clear intake tube and high water flow = much crap, quickly sucked in.
So after 2 days, I pulled the filter, filthy. I hosed it off, clean again.
My tank is in a window, but it's the only place I have to put it.
So, I have come to some conclusions.
A. HOB sucks because it does not remove solids from the bottom
B. Putting a new filter in as soon as you top up, clogs it very quick with suspended solids (I suppose you could wait to add new filter until it settles)
C. BUT, cleaning the filter a couple days later, removes more gunk
D. About once every 5 days, spray the filter clean with a hose, reinstall, agitate the bottom to stir the solids so the filter can do half it's job of MF.
Thoughts? My opinion? HOB sucks at removing settled solids.
Whatever happened to those under gravel filters? Guess they were not great either?I have tried a lot of filters and NOTHING I have tried has ever been that great at removing solids from the bottom!
Most HOB's that I have used have pipes that allow you to extend the HOB intake as near to the bottom as possible. Once you have the intake as near to the bottom as possible (whether it be HOB, canister or sump) the best you can do is add a bunch of power heads to direct the waste towards the intake. This isn't a HOB issue, it is an age old aquarium filtration issue.
So while I agree the HOB filters do a lousy job at removing waste from the bottom of the tank... so does everything else!
When you stir everything up while doing water changes and plug up your HOB mechanical filtration... it is pretty easy to take it out and wash it off. When this happens with a canister filter it is a WHOLE lot more work to take out the mechanical filtration and rinse it out... so this hardly ever happens... at least in my tanks. The design of a sump will dictate how easy it is to clean the sumps mechanical filtration... my belief is to design the sump to be as easy to maintain as possible! monsterfishkeepers.com/forums/threads/180g-attempted-low-easy-maintenance-peninsula-dirt-bottom-planted-tank-build.714316/
Whatever happened to those under gravel filters? Guess they were not great either?
When I was a boy, I remember the ten gallons. The airstone was at the bottom of each tube with a tiny charcoal filter at the top of each. Those looked even worse than a HOB.Actually they can be pretty awesome if set up and maintained properly