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post #1 of 4 Old 07-10-2011, 10:56 PM Thread Starter
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Question filter keeps going out

my filter keeps going out, so i was looking for suggestions on a good tank filter.
currently my water is cloudy because the filter isn't working properly. so i need to know what filter is a good filter to get. my tank is 25 gallons (i know i need a bigger one than that) i have 2 Goldfish and 1 molly and 3 platys, and 1 baby Platy.

thank you in advance

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ashleyjoy1989 is offline  
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post #2 of 4 Old 07-10-2011, 11:37 PM
I strongly recommend the Marineland Penguin 350 Bio Wheel HOB filtration system. It is a great product that I have on my 27gal tank along with the smaller ones I've used in the past. Some people complain about buying the expensive filter media, but you can just wash them off and use them for months. They run really quiet (loud at first then becomes quieter over time) moves 350gph and is a decent price. I however have no experience with canister and undergravel filters, hopefully other people will chime in so you can make the best decision that works for your situation.
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post #3 of 4 Old 07-11-2011, 05:22 AM
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If you are considering a canister filter, the Fluval 205 would be a good choice for a 20 Gal. It's rated for up to 40 gal and a GPH of 180. With media I expect the GPH to go down, however you'd still be getting over 5x filtration, and with goldfish you want that filtration capacity.

A neat trick it to stuff the bottom tray with 100% poly-fill for that extra mechanical filtration .. it really does a great job capturing microfine detritus the foam/sponge pads can't. The rest of the trays can be filled with Biomax rings (never need to be changed)

Good luck!

75g FW Cyprinidae Tank - Running Fluval 404
5 BlackRuby, 4 Albino Tiger, 4 Odessa, 3 Tiger, 2 Green Tiger, 3 Denison, 2 Cherry, 2 Gold, 2 Checkered BARBS + 4 Zebra Danios, 1 Red-tail Shark. Looking to add 4 Five Banded Barbs
Barbman is offline  
post #4 of 4 Old 07-11-2011, 09:23 AM
My personal inclination is to steer clear of cartridge type filters, even ones with a rotating sponge, unless you have some other means of bio-filtration or have lots of thriving, living plants.
I have seen very successful larger tank setups where cartridge HOB's were used for mechanical filtration while a canister was used for bio-filtration.

For HOB, I've become a fan of AquaClear. It has flow control that promotes re-filtration and a fair sized chamber for mechanical, chemical (if desired) and biological (BioMax) filtration.
For canisters (I don't have one), there are three top contenders, Enheim, Fluval, Rena. I like the Fluval design, but others quite like the EnHeim.
Expect to pay $100 or more on a canister, less than half that for a HOB.

It's general 'knowledge' that we should have 4-6 times the aquarium size in gallons per hour flow. Some suggest as high as 10x. I personally think that blasting more water through filter media does not make for better filtration and what we really want is a lower flow rate with finer filtration media.
With the above in mind AND considering circulation in the tank, a filter with flow control is desired. In many cases, you may also need some type of baffle on return unless you're simulating a river of flow.
Although some text would indicate many fish species live naturally in rivers in the wild, many of our fish are pond or tank raised and prefer reduced current.

I have two AquaClear 70 filters on my 60g, both set at lowest flow rate (maximum re-filtration) and use water bottle baffles to redirect flow along the back wall making for a very calm tank.

Hope this helps a little
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