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Thanks for the information! I currently have a topfin70 hob and a large spongefilterIslandvic said:I agree with Jonmott
The Pro 4+ series of Eheims are over priced at Petsmart.
They usually only run sales on Fluval x06 and x07 series a few times a year + Black Friday. They are good but I would only buy one on sale.
If you and to go with one of those, sign up to receive emails from Petco and you will probably receive promo codes for 25% off plus free s&h on orders. They sell the 06 and 07 Fluvals and 25% off is always a good deal.
Ive noticed that Petsmart routinely has the FX4 for $199, but that is probably to much filter for a 50 gallon.
Kensfish.com has the Eheim Classic 2217 for $150 and change. I like shopping at Ken's, they have free s&h and do not charge tax.
They also have a great selection of house branded fish food. My fish love Ken's fish food.
Are you using a HOB now?
Im sure a large sponge filter + a Tidal 110 HOB would filter you 50 gallon just fine. Ken's Fish has them for $62, the lowest I have ever found them. They have a large selection of sponge filters also.
I'll go with the fluval fx 4 canister filter.Cichlidude said:The general rule of thumb is your fish tank should turn over your water volume at least 4x per hour for best efficiency. All manufactures rate their pumps at the head level only. This means their ratings do not include head pump lift (canisters typically 3 feet: 7-13% loss), filter media baskets, filter media itself, tubing length, U bends from the input tube and output tubes or even the 90 degree bend for your spray bar. All this alone will reduce the flow by at least 25% right out of the box.
Now add all your media which is jam packed with course, medium, fine pads, bio ceramic rings, hard media like Matrix, Biohome or Marine Pure Balls and now it gets dirty and clogged in weeks. This adds another 25% reduction. So now you have a 50-60% restriction in water flow. Which now leaves you at 2x your flow rate and you need 4x to run correctly. This is why you should get a filter with at least 8x-10x flow rate (manufactures specification) because of this 50% reduction will bring you to the 4x recommended flow. Canister filters hold more media than a HOB, so they can have a little less flow if you want (5x-6x) but 8x will cover both types of filters. Always best to have slower water flow over your media than more, so the water stays in contact with the media longer to promote maximum bacteria growth and still keeps good water movement in your tank. This is for normally stocked to heavily stocked tanks.
Tanks with less fish or lightly stocked will do just fine with a smaller filter than mentioned above.
With that said…
A 50 gallon tank would need about 400-500 gph for best efficiency. Amazon has canister filters and you want one rated 4 stars and above. Here are some.
Amazon.com: canister filters for aquarium - 4 Stars & Up