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Old 01-24-2014, 08:45 PM   #1
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Filtration for Goldfish Tank

Hello! I am trying to figure out what filtration setup to use on a 40 gallon breeder goldfish tank I am planning.
1. Aquaclear 70, Aquaclear 30: 450 gph
2. x2 Aquaclear 70: 600 gph Is this too much flow?
3. Aquaclear 110: 500 gph
4. Rena Filstar xp1, Aquaclear 50: 450 gph
5. Rena Filstar xp2, Aquaclear 30: 450 gph
6. Rena Filstar xp3, Aquaclear 20: 450 gph
7. Rena Filstar xp4: 450 gph
8. Eheim Ecco 2236, Aquaclear 70: 459 gph
9. Eheim 2215, Aquaclear 70: 464 gph
Would any of these setups work? Which is best? Thank you!
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Old 01-25-2014, 12:03 AM   #2
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There's pretty much no such thing as too much filtration when it comes to goldies. The higher the GPH, the better. I'd go with the AC 70, 600 GPH.
How many goldfish are you planning to have in the tank? Or will this be for fry only? If so, that's the only exception to the "too much filtration" rule and I'd need to reconsider my advice.
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Old 01-25-2014, 01:50 AM   #3
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There's pretty much no such thing as too much filtration when it comes to goldies. The higher the GPH, the better. I'd go with the AC 70, 600 GPH.
How many goldfish are you planning to have in the tank? Or will this be for fry only? If so, that's the only exception to the "too much filtration" rule and I'd need to reconsider my advice.
Probably 2 or 3, either ryukins or ranchus. Wouldn't a canister be better, though?
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Old 01-25-2014, 07:04 AM   #4
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I have two AC 70s on my 55g for my shubunkin goldfish. Love those filters!

There's a ton of room to choose what you want in the filters if you like to customize it. I currently have the foam block that comes with it, a pack of purigen, and two bags of bio balls in each of my filters. I took out the carbon that came with them. The water is always really clear. You can also adjust the flow rate on the AC 70s.

I hope this helps.

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Old 01-25-2014, 07:28 AM   #5
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Quote:
Originally Posted by Platiesareawesome View Post
Hello! I am trying to figure out what filtration setup to use on a 40 gallon breeder goldfish tank I am planning.

1. Aquaclear 70, Aquaclear 30: 450 gph

2. x2 Aquaclear 70: 600 gph Is this too much flow?

3. Aquaclear 110: 500 gph

4. Rena Filstar xp1, Aquaclear 50: 450 gph

5. Rena Filstar xp2, Aquaclear 30: 450 gph

6. Rena Filstar xp3, Aquaclear 20: 450 gph

7. Rena Filstar xp4: 450 gph

8. Eheim Ecco 2236, Aquaclear 70: 459 gph

9. Eheim 2215, Aquaclear 70: 464 gph

Would any of these setups work? Which is best? Thank you!

I would go for number 9. A canister filter in my opinion, is much better than a HOB filter. Despite the difference in flow rate, u get much more mechanical and biological filtration with a canister filter. A good rule of thumb is to turn over your wafer volume 10 times in an hour and all 9 choices meets that criteria. I also love eheim, such a reliable brand.
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Old 01-25-2014, 10:13 AM   #6
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You might consider #10) Eheim 2215 & FluvalC4

The C series is far superior to AquaClear (both made by Hagen). Discussed "ad-naseum" in these three threads:

HOB filter recommendation

Fluval C4 vs bio wheel HOBs

AquaClear Bypass Issues

I own ac50, 2 C3's & one C4 and can assure you the Fluval C is the best HOB on the market.
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Old 01-25-2014, 12:09 PM   #7
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Would it be better to have only one, more powerful canister?
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Old 01-25-2014, 12:11 PM   #8
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Would it be better to have only one, more powerful canister?

Ya u can do that too but having two gives u more redundancy.
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Old 01-25-2014, 12:19 PM   #9
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Ya u can do that too but having two gives u more redundancy.
Also, if one were to quit working, you would still have a back up. That's the main reason I went with two smaller filters.

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Old 01-25-2014, 12:27 PM   #10
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Having two filters will also help avoid problems with "dead spots" in tanks with large surface area like we saw here:

Optimal Filtration
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