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Old 02-29-2012, 02:35 PM   #1 
Hopeseeker
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Question Are sponge filters better than internal or external filters?

If anyone has any info, such as pros and cons on any of the types of filters mentioned above, Please reply!! I'm in the planning stages of a 15 gallon sorority and want the best options for fish health and not spending an arm and a leg all the time!!!
Thanks for anyone who responds!!!
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Old 02-29-2012, 04:02 PM   #2 
Bombalurina
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Sponge filters:
Pros
- Gentle, generally only creating an upward current
- Do create surface movement (good for getting dissolved oxygen into water, though that isn't important for bettas)
- Can be adjustable with a check valve in the airline
- Come in a big range, from tiny and wee to huge and monstrous
- Extremely easy to clean (just rinse sponge in dirty tank water)

Cons
- They don't usually come with the airpump needed to run them, so you may need to buy one
- They create a bubbling noise that you may find annoying
- There is frequently only one sponge in smaller ones, so replacing it will restart the cycle

Internal filters
Pros
- Huge variety of brands and styles
- Usually easy to baffle
- Easy to maintain
- Multiple stage filtration
- Some are very quiet (no waterfalll noises either)
- If one part needs replacing, you won't lose the cycle

Cons
- They take up room inside the tank
- Most brands mean you have to get your hands wet to maintain them
- During maintenance, you may get some gunk in the tank

External filters
Pros
- Come in two types - HOB and canister - for different purposes
- Some are easy to baffle
- Easy to maintain
- Multiple stage filtration
- Some are very quiet
- If one part needs replacing, you won't lose the cycle

Cons
- Some are not so easy to baffle
- HOB filters require space on the back of your tank
- Can ruin the asthetic of the outside of the tank
- Some make annoying waterfall noises

That's my summary. :) I haven't touched on Undergravel filters because I hate them.
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Old 02-29-2012, 05:41 PM   #3 
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Quote:
Originally Posted by Bombalurina View Post
Sponge filters:
That's my summary. :) I haven't touched on Undergravel filters because I hate them.
I agree on the undergravel ones......had one for my first betta....can't stand them!!!!
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