Sponge Filter Floats

VTwinFanatic

Endlers
Mar 17, 2005
505
0
0
40
North Carolina
I have two Hydro-Sponge V Filters in my 55gal discus tank run by a whisper 100, Ive noticed that everytime i wash the filters out to get the debris out (which is at the same time i do a w/c) that when i restart the pump that the filters float for a while...most of the time I have to end up squeezing them a few times and hope that they stay on the bottom then. Ive tried doing this prior to starting the pump, but they still float. Its a bare bottom tank so I can bury the weight in the substrate to keep it down...anybody have any tricks or ideas to keep the sponges down?
 
After you squeeze out the gunk in a bucket of tank water to clean the sponges, stick in your tank and squeeze the air out of the sponge...
 
I cant really rig up a suction cup due to their large size...they are "rated" for a 125gal tank each...and ive got two of them stacked...they have about 2.5inches of foam around the center tube.

I have also tried squeezing the sponge inside the tank...it doesnt work either...they seem to stay down until I turn the air pump back on
 
i use a sponge in my breeding tank and usually just giving it a good squeeze all over will make it sink.
 
pour a few stones down the chimney of the filter to weigh it down.

On a side note, how are the sopnge filters working for you?
 
I really dont feel like a few rocks will weigh these HUGE filters down...they have about a 6+"
diameter which holds a lot of air...and being that they are stacked makes it even worse...I had them seperate for a while, but I get much better results running them stacked with one air line feeding them rather than them being seperate w/ two seperate air lines.

LEGENDARYFROG: I LOVE MY Sponge Filters...I have the two in my discus tank and one in both of my cherry shrimp breeding tanks. I do weekly w/c's on all my tanks (with the exception of my discus tank they get 2+) so my solid debris stay at a minimum. As far as all my readings go they are Ammonia 0ppm, Nitrite 0ppm, and Nitrates~10ppm, they are much quieter than HOB filters that I used to use and much easier to maintain.
 
I'll agree that sponge filters are awesome; I just discovered their greatness 'bout 2 months ago. Right now, all of my tanks (except my mini-reef) have one.

Currently, I'm using these sponge filters, http://www.drsfostersmith.com/Product/Prod_Display.cfm?pcatid=3953&N=2004+113424, and they also had problems with constantly surfacing. Like I said before, I dumped a couple rocks into the chimeny, which solved the problem.
 
I've had the same problem keeping my sponge filter on the bottom of the tank. I put a couple of lava rocks on the sponge to wiegh it down and some more around the periphery to make it look more like a rock pile than a sponge filter.
I've had good success with mine. It's quiet and peacefull, all you hear are the bubbles, and it provides adequate mechanical and excelllent bioligical filtration.
 
http://www.bigalsonline.com/BigAlsUS/ctl3684/cp19170/si1379360/cl0/lustarhydrospongefilter5 this is the type that im working with (x2). I'll try the rocks in the chimney...i actually found the success of sponges about a year ago...i started with one of the Hydrosponge 5 along with an XP2 on my discus tank...but I decided to change the canister filter to my 30gal planted tank to take the place of my HOB filter and the constant surface aggitation and noise. I placed the 2nd Sponge in the tank about 3 weeks before i moved filters around...after that I decided to change the HOB filter on my shrimp breeding tank for a sponge, then had to buy another one for my small 5.5 gal tank that i had a few sparkling gourami in, but moved them to my sister 10gal planted tank...and made the 5.5 into another shrimp tank....I have them in every tank except my planted tanks...and I LOVE THEM
 
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