Well i stuffed up the tank with a significant lack of heating when winter hit and the room the tank was in had no heating and got cold, ie same as outside temp pretty much so below 10 degrees a couple of times. This resulted in the tank temp dropping to way too low and a loss of a lot of fish. Of course this happened while i was away for ten days so couldn’t do anything about it.

Ive now gone the other extreme and have put heaps of heaters in the system, 6 300 watt Eheim currently plus the 2280 canister filter that has the 500 watt element in it.

The big challenge i now have is that all of the heaters seem to think the same temperature is quite different and getting them in alignment is impossible.

4 heaters in the sump and all set at up to 3 degrees different to try and ge them to come on and off at the same time lol.

So this morning i bought an electronic controller that can handle 2400 watts through it on either heating or cooling, so good for a chiller as well but I don’t run one at this time. Thinking of maybe adding one as i have a spare one.

So tonight will plug the two power boards into the back of the controller and drop its probe into the tank and set it up at 28 degrees as per a glass thermometer. Should be enlightening to see how accurate the electronic probe is.

But once the temp is set all 6, possibly 7 as i still have a spare heater, will now be controlled by the one device and no matter whether they are in the sump or the tank itself the heaters will all turn on and off together.

Hopefully this will stop the constant on of all the heaters, the Eheim canister will still be on its own but i plan to set it slightly lower than the constant temp i am aiming for so it will only need to kick in when i do a water change or the room is really cold during winter.

Good in theory now to see how it works in practice. Surely 1800 to 2100 watts of Eheim jaegers should give it a good crack .