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Old 09-30-2010, 11:46 AM   #1 
dragonfair
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Filters: HOB vs Undergravel?

Hi y'all. I've been searching for some info here and I may have missed previous postings about this. I currently have male bettas - 1 in a 10 gallon and 1 in a glass pitcher. Long story short: tried a tank divider, disasterous results, not gonna go there again.

Anyhoo, because of budget concerns, I'm selling my 10 gallon set up and using that $ to get two 5 gallon tanks, so everyone has a chance to stretch their fins. I want to stay with filters and heaters, but I can't find much info out there on HOB vs undergravel. Are there any advantages and disadvantages of one type over another? Years ago I had some bettas in their own 1 gal tanks with undergravel filters, but I can't remember anything about the tanks and I want to give them more room.

Any thought would be appreciated.
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Old 09-30-2010, 12:11 PM   #2 
Adastra
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I don't like UG filters--they're a pain in the butt to maintain since you have to tear up your whole tank to clean them out. They're messy. You definitely can't have rooted live plants and a UG filter. They do make decent bio filters, but I'd much rather use an HOB for convenience.

If you want a filter that works in a similar way to the UG but isn't actually under the gravel, go with a simple sponge filter.
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Old 09-30-2010, 01:22 PM   #3 
Oldfishlady
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IMO/E-UGF are good and not all that hard to maintain-you don't have to do complete tear down to maintain if you use the correct size substrate and vacuum the substrate/gravel weekly to maintain water flow under the plate-you are limited to the species of plants that you can have with UGF-the roots can clog the plate an it won't work correctly.
The UGF are great for this species fins- it has limited water movement like with sponge filters (that are also a good choice)-the HOB type filter can sometimes be too strong in small tanks and tear up fins from just the water flow unless you baffle them.
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Old 09-30-2010, 02:06 PM   #4 
dragonfair
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Yeah, my filter is way too strong in my 10 gallon. I had to build a baffle to keep Maxi from being swept from side to side!

So, I'm assuming a sponge filter is different from attaching a sponge to a HOB filter to baffle the flow...?
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Old 09-30-2010, 02:11 PM   #5 
Adastra
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It is, lol. It's basically a tube with a sponge attached to the base that uses an air pump to draw water and air through the sponge. Very simple and effective, I use them with my halfmoons.
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