zizziz

I got me a 125G, would i be better off getting 2 heaters that do up to 90G like the rena 300W one? Position them on opposite sides of the tank?

Cody

yes i would say in a tank that size that woudl help out alot, since 125 are generaly 6 long, if you have it on one side or the other, that alot of tank to cover, with two it kinda balances it out, and then if one fails you still have a back up

Fish Addict

Also, if one shuts off, there is a better chance that the tank won't get too cold...

Shawnie

I agree and im sooooooooo jealous about the size of tank you have!! maybe santa will bring me one

zizziz

hehe, don't be jealous! just hunt on craigslist for about a month or two and you can get yourself a good deal.

COBettaCouple

I think that 2 heaters, each positioned 1/3rd of the tank length from each end would give better heat distribution that 1 heater in the middle.

zizziz

thats what I did, each at 1/3 just at the edge of the stream from the filters.

Dino

Oh, sure, put pressure on me.
That would take up a lot of room in the sleigh.

Annadvn

I have 2 125g each has a single 300w heater.

One of the tank is a river set up so the water is constantly moving. The other the heater is set up under a filter outflow so the water get warms as it moving. That heater is about 3" from one end of the tank, and the tank stays at 80f all the time from the one heater.

You don't need two 300w heaters, you could probably get away with 2 heaters for up to 75g if you want to put more than one heater in (heaters are the most expensive things to run in a tank for energy consumption).

I would just put one heater in by the filter intake or outtake so the water moving from the filter will spread around the tank and heat the water up evenly.

In lots of articles i have read, the larger tanks with sumps usually only keep the heater in the sump and use the water movement to keep the main tank at a steady temperature (how i got the idea to place the heater under the filters and power heads)

This is my lots of experienced people have said use two heaters.

Anna