does any1 have a heater for a 90 gallon? if not how many watts do u think i should use? was thinking about possibly buying a 300 watt dont know if that will be enought but i do also have like a 100 watt heater in ther refug.
im soure someome else will chime in but i dont think the size really matters. i think it will just take it longer to heat the water.
i would go with 2 heaters. incase one craps out you have a back up. before you reallize that the waters 68 degrees and your wetting your pants trying to figure out why your 100$ coral is looking like crap why not get another heater and avoid the situation all together.
i will have two heaters in my new tank and they will both be in the fuge. make soure there in the fuge. they can get destroyed by lr in the display.
i would say buy another 100-200 watt heater. it should be plenty of heater. hopefully this will help.
Heater size does matter. If the tank/room temperature differential is large, it’ll take a larger heater to make up for the thermal losses. If the heater is too large, the temperature could swing fairly rapidly.
You going to want about 300-400 watts for a 90, depending on how cold the ambient room temperature is the temerature difference between the room and the tank. If your room tends to be warmer, 300W; if colder then 400W.
If your room temp averages 65 and you want the tank at 80, then that would be a 15 degree differential. In that case I’d shoot for the larger number. But if your room averages around 72 and you want the tank at around 80, then the smaller wattage should be OK. And I’m NOT saying 80 is the ideal temp. In fact, my tanks don’t run @ 80. These are just numbers to illustrate the differential.
Brett has the right idea with multiple heaters, though. You could do
- 2 150W heaters
- 2 200W heaters
- 1 of each (150 and 200)
Just be sure to set them close to each other (in temp.) and check to make sure they are BOTH working on occasion.
edited for clarity …
may have a heater i could sell to u 4 cheap
Ted that was correct as usual and very clear.
Just as an example, on our 90g tank (100g system total) we use 2 heaters, one 300W heater set at what we run our tank at, and one 200W heater set about 3 degrees below that. If the main one fails the 2nd kicks on. I actually plan on replacing the main one with a 200W so that if it fails and sticks on it cant cook the tank though.
bz how many watts is it and how cheap is it?
As I was recently researching the same thing, I saw somewhere (can’t remember where but it matched well with numbers I saw almost everywhere) you want 2W per gallon per 5 degrees temperature difference.
So 2x90 is 180 and as ronert said the temperature differential is the important part.
65 room to 80 tank would be 15 degrees so 180x3 is 540 W.
70 room to 80 tank would be 10 degrees so 180x2 is 360 W.
WOW, those numbers seem really high.
Anyway I got 2 200W for my 75 but we keep our house below 66-68.
Ronert recommended to me that get 2 at 2/3 of wattage needed. So for 300W get 2 200W. The theory behind this is it taxes the heater less, but more importantly if one fails the 200W should be able to hold the proper temp better than a 150W. Or if your heat goes out and the temp diff in the room increases…
I noticed walmart has a pretty decent seeming 200 watt adjustable heater (whipser) for a decent price. Might want to check it out, I’m thinking ~$25. They list it as 30-60gal tank. Two of those would do you nice as far as back up and ability to keep temp. On another note if you put the tank in the basement, raise the sump off of the COLD basement floor, your heater won’t work nearly as hard and your 'rents won’t complain as much about the electric bill.