Heaters

fishkeeprian · 11/02/2017, 04:52 AM

Hello,

I'm looking to purchase heaters for my tank build and I have read multiple heaters are better than 1 or large heaters.

My tank total water volume will be approx 66 gallons so I was thinking of using 3 x Eheim 75w heaters on an external temp controller?

What are your thoughts and opinions?

https://www.eheim.com/en_GB/products...rmocontrol-75W

mcgyvr · 11/02/2017, 07:31 AM

Sounds like a good plan..
75 x 3 = 225W
66 x 3 = 198
225 > 198
Assuming no more than say a 10 degF (5 degC) temp difference that should be just fine.. I usually recommend about 3x water volume
2 x 100W or 125W is what I personally would choose.. No real need for 3.. 2 is good..

shaginwagon13 · 11/02/2017, 10:21 AM

Quote:

Originally Posted by mcgyvr

Sounds like a good plan..
75 x 3 = 225W
66 x 3 = 198
225 > 198
Assuming no more than say a 10 degF (5 degC) temp difference that should be just fine.. I usually recommend about 3x water volume
2 x 100W or 125W is what I personally would choose.. No real need for 3.. 2 is good..

+1 I agree with this.

Dmorty217 · 11/02/2017, 11:04 AM

Put your heaters on a controller. When heaters fail, the always fail on.

outy · 11/02/2017, 01:49 PM

Quote:

Originally Posted by Dmorty217

When heaters fail, the always fail on.

Summer I unplug all of mine. Winter it could never overheat the tank

outy · 11/02/2017, 01:51 PM

Quote:

Originally Posted by fishkeeprian

I was thinking of using 3 x Eheim 75w

One good 300W heater is better, no reason to add multiple points of failure.

your tank should have more then enough turnover to not need multiple heaters.

1 X 150W should be enough, I did 300G on a 175w for over 20 years. Of course I had MH keeping the water warmer then normal.

der_wille_zur_macht · 11/02/2017, 02:57 PM

Outy, the point of multiple smaller heaters is that a single failure will be a much smaller impact. If a 300w heater sticks on in a small tank, your livestock will cook in no time. If a 75w heater sticks in a small tank, it's probably not going to cause any losses and you'll be able to solve the problem with minimal impact.

Yes there's a theoretical increase in failure rate but it's arguable that you're making a positive tradeoff in terms of overall reliability.

outy · 11/02/2017, 03:38 PM

Quote:

Originally Posted by der_wille_zur_macht

Outy, the point of multiple smaller heaters is that a single failure will be a much smaller impact. If a 300w heater sticks on in a small tank, your livestock will cook in no time. If a 75w heater sticks in a small tank, it's probably not going to cause any losses and you'll be able to solve the problem with minimal impact.

Yes there's a theoretical increase in failure rate but it's arguable that you're making a positive tradeoff in terms of overall reliability.

Fair enough, I'm fine with 1 and failsafe, everyone has different beneficial needs, tank size depending.

nereefpat · 11/02/2017, 05:32 PM

Quote:

Originally Posted by der_wille_zur_macht

. If a 75w heater sticks in a small tank, it's probably not going to cause any losses and you'll be able to solve the problem with minimal impact.

Yes.

And you'll be able to get by with the functioning 75 watt until you replaced the one that failed.

11/02/2017, 04:52 AM	#1
fishkeeprian Registered Member Join Date: Feb 2016 Location: England, Earl Shilton Posts: 1,452	Heaters Hello, I'm looking to purchase heaters for my tank build and I have read multiple heaters are better than 1 or large heaters. My tank total water volume will be approx 66 gallons so I was thinking of using 3 x Eheim 75w heaters on an external temp controller? What are your thoughts and opinions? https://www.eheim.com/en_GB/products...rmocontrol-75W

11/02/2017, 07:31 AM	#2
mcgyvr Registered Member Join Date: Sep 2003 Location: North Carolina Posts: 20,050	Sounds like a good plan.. 75 x 3 = 225W 66 x 3 = 198 225 > 198 Assuming no more than say a 10 degF (5 degC) temp difference that should be just fine.. I usually recommend about 3x water volume 2 x 100W or 125W is what I personally would choose.. No real need for 3.. 2 is good.. __________________ Who me?

11/02/2017, 11:04 AM	#4
Dmorty217 Saltwater Addict Join Date: Jan 2012 Location: Vandalia OHIO Posts: 11,624	Put your heaters on a controller. When heaters fail, the always fail on. __________________ Fish are not disposable commodities, but a worthwhile investment that can be maintained and enjoyed for many years, providing one is willing to take the time to understand their requirements and needs Current Tank Info: 625g, 220g sump, RD3 230w, Vectra L1 on a closed loop, 3 MP60s, MP40. Several QTs

11/02/2017, 02:57 PM	#7
der_wille_zur_macht Team RC Member Join Date: Sep 2003 Location: NY Posts: 17,749	Outy, the point of multiple smaller heaters is that a single failure will be a much smaller impact. If a 300w heater sticks on in a small tank, your livestock will cook in no time. If a 75w heater sticks in a small tank, it's probably not going to cause any losses and you'll be able to solve the problem with minimal impact. Yes there's a theoretical increase in failure rate but it's arguable that you're making a positive tradeoff in terms of overall reliability. __________________ Inconveniencing marine life since 1992 "It is my personal belief that reef aquaria should be thriving communities of biodiversity, representative of their wild counterparts, and not merely collections of pretty specimens growing on tidy clean rock shelves covered in purple coralline algae." (Eric Borneman)