Questions about heaters - Page 3 - Tropical Fish Keeping - Aquarium fish care and resources
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post #21 of 26 Old 03-03-2013, 09:55 PM
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Originally Posted by AbbeysDad View Post
I didn't write that at all - here's exactly what I wrote:
"The OP has a 72g tank. It seems to me that two canister filterson anything less than say a 125g is way over the top (and even then one would do, especially if planted)."

Typically, one canister filter rated for the tank size is plenty...more than enough since many/most can't be easily throttled back to less flow. Actually, there are many with large heavily planted tanks that merely use a sponge filter. So if that works, why would we need two canister filters, each rated for the tank size?
"and even then [125] one would do" means 2 is unnecessary. That's exactly what you said. I'm glad that's all you need for your 6 foot tanks.

Yes, most canisters DO come with built in ball valves to control the flow. For the rare ones that don't, it's a simply DIY fix - very easy to do.

I guess you just assume that everyone keeps lightly stocked, heavily planted tanks.

I've stated the reasons why I do what I do. You can reread them. As I've already said, one can use two smaller filters. MOST places recommend using 2 smaller filters rather than one big filter. The consensus of every other forum I've been on is that the manufacturer filter ratings are grossly overstated. Perhaps all those experienced fish keepers are all wrong.

125 - BGK, chanchito cichlid, pictus cats, silver dollars, palmas bichir
125 - cichlids (severums, bolivian rams, chocolate), rainbows ( turquoise, red), loaches (angelicus, zebra, kuhli and horseface), plecos (BN, RL and clown), denison barbs, tiretrack eel, pearl gouramis, betta
90 - Congo tetras, african knife, upside down cats, spotted ctenopoma, kribensis, delhezzi bichir
2.5 - betta
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post #22 of 26 Old 03-04-2013, 08:52 AM
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Just for clarification on what I am planning for my 72 gallon I will be setting up one canister filter, have decided on the Rena (fits well within my budget and the reviews I have read in the filter are favorable) For the heater I will be doing one inline heater with the filter and will have a second heater that will be placed into the tank that will act as a backup heater in case something malfunctions with the inline heater. With I myself have no plans of doing two filters on this tank since with one filter, plants and weekly water changes every thing will be kept in check. When I was running my 50 gallon long I actually had two sponge filters that I ran on that tank along with it being planted. Numbers kept in check with this set up.
That's great. The Rena filters are highly regarded and I'm pretty sure you won't need another one too!
As mentioned before, it's also a very good idea to have a secondary heater to better ensure a consistent temperature in the event the room temperature falls or one heater fails... And if you're very patient with settings you can even achieve some load balancing which could lead to longer life.

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post #23 of 26 Old 03-04-2013, 09:30 AM
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The Rena canisters have a ball valve that goes on the spraybar to control the flow. For future reference.

125 - BGK, chanchito cichlid, pictus cats, silver dollars, palmas bichir
125 - cichlids (severums, bolivian rams, chocolate), rainbows ( turquoise, red), loaches (angelicus, zebra, kuhli and horseface), plecos (BN, RL and clown), denison barbs, tiretrack eel, pearl gouramis, betta
90 - Congo tetras, african knife, upside down cats, spotted ctenopoma, kribensis, delhezzi bichir
2.5 - betta

Last edited by jaysee; 03-04-2013 at 09:46 AM.
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post #24 of 26 Old 03-04-2013, 09:46 AM
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Originally Posted by AbbeysDad View Post
But as you wrote in another thread, you have two canisters and each is rated for your tank size and setup like a whirlpool. I think far too many buy into the myth that we need 4x to 10x the tank size in filter flow gallons per hour (GPH). It has always seemed to me that if we can't filter/purify the water by filtering every drop 2x-4x times per hour, something must be wrong and blasting more water through really won't solve the problem.
I also have trouble with the obsession that there needs to be so much flow so there is never any mulm on the substrate. This is really counter productive as mulm feeds the substrate organisms that feed the plants and creates the very best bio-filter. And how much sense does it make to remove this organic material only to compensate by adding bottled fertilizer?
Finally, and perhaps most importantly, are the fish. Many/most of our fish were not raised in raging rivers, but rather tanks or ponds. Having to swim hard just to stay still must be difficult for many fish.

Proponents of over filter flow say 'but my water is crystal clear'. But then my water is crystal clear and my flow rate is only about 2x. Go figure.

Speak about flow rates and particulates, and crystal clear water, when you have kept large tank's holding numerous large Cichlid's,pleco's,goldfish, or large number's of fry,bait fish.
Even those who run heavily planted tank's,particularly those with CO2 injection,,strongly support heavy flow rates(10X) to assure CO2 and nutrient's are dispersed throughout the tank.
Not as critical in natural planted,low tech tank's where nurient's ,CO2 aren't being dosed as heavily as they are in CO2 injected tank's .
You keep saying it is a myth regarding water movement,flow, but it is only your opinion.
Hundred's,perhap's thousand's of accomplished hobbyist's (myself included) have learned otherwise, as will you when and if you attempt to care for a large number of larger fish.
Because YOU say it is a myth does not make it true in application.
Been there,done that.(Many other's).

Would urge those interested to google the question... "How important is increased flow,filtration,in the aquarium?" and form your own opinion's
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Last edited by 1077; 03-04-2013 at 10:02 AM.
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post #25 of 26 Old 03-04-2013, 06:09 PM
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I don't see why you couldn't put 2 inlines in tandem. If each one will be capable of heating the tank on their own, then the second one will only come on if the first fails.
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post #26 of 26 Old 03-04-2013, 06:32 PM
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125 - BGK, chanchito cichlid, pictus cats, silver dollars, palmas bichir
125 - cichlids (severums, bolivian rams, chocolate), rainbows ( turquoise, red), loaches (angelicus, zebra, kuhli and horseface), plecos (BN, RL and clown), denison barbs, tiretrack eel, pearl gouramis, betta
90 - Congo tetras, african knife, upside down cats, spotted ctenopoma, kribensis, delhezzi bichir
2.5 - betta
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