[sayn3ver]

The 300w hydor inline heaters only come in 5/8inch barbs. The 2217's output is 1/2 inch tubing. Is there a step down or something i can use? Or will 2x200w inlines be enough for a 90g(will have 2x2217's on the 90g). The reason i am stressing is that in the winter the house temp hovers around 60 degrees.(like right now).

 

[BSS]

I would guess that you could heat the 1/2" tubing (dip the end of the tubing in microwaved water for 10-20 seconds) to stretch it over the 5/8" barb.

As I live in FL, I always debate whether I need a heater or not, so can't help you on the sizing of the heaters.

 

[crazie.eddie]

You can buy reducers at your local hardware shop. Otherwise, a 200 watt heater would be fine. Although I use 2 filters, Eheim Pro II 2128 with built in heater AND a Rena FilStar XP3 with a Hydor ETH201 (200 watt) inline heater, the XP3 with the Hydor ETH201 does a fine job keeping the temps up by itself, which I've tested. The Eheim Pro II 2128 uses a built in 200 watt heater (I believe) and I used it in my 55 gallon tank for awhile.

 

[Betowess]

I agree with CE. But the one advantage to two 200 watt heaters is the temp is more consistent on both sides of the tank. I am sure one 300 watt Hydor will do it. They seem to be the best heater on the market. Set them once and forget it. If you go with two, you'll need to play around with the settings so they both come on about the same amount of time.

 

[sayn3ver]

no no no, i was planning on 2 x 300w until i realized they only came wit 5/8inch barbs.

 

[slickwillislim]

I took a match and heated my 1/2 inch tubing and it slid on to the 5/8 inch barb. I also did one by sliding it over the outside of 1/2" hard pvc nipple attached to a 1/2" hose barb. Either way works but the heating the 1/2" tubing is probably the easiest.

 

[sayn3ver]

good. i'll just go ahead and get the 300's then. Following the rule of thumb(5watts per gallon) i need roughly 450w for the tank(90g). Thus, i feel comfortable with the two 300 watts more so than the 200watters, just because the house gets real cold at night.