Need Help Deciding Which Heaters To Get For Two Tanks

[wodesorel]

I'd been using Hydor heaters in my 7 gallon and 20 gallon for the past six years, but both of them decided to start leaking and overheating at the same time. The heaters were good but not very accurate over the years, and I'm planning on changing brands. I've enjoyed the accuracy of the one Visi-Therm Stealth in the 5 gallon that's been in use for 3 years, and would like to buy another Marineland heater. However, it seems like they have two versions available - a regular Stealth and a Stealth Pro. Aside from an indicator light and a few dollars in the price I can't figure out if there's any other difference. I'm hoping someone here has been able to actually look at these products in person and could help guide me as to which is a better choice. I have to do all my shopping through the internet because none of the local stores carry a good selection of products.

Also, I'm wavering on which size heater to get for the 20 gallon. I had been using a 50W Hydor during the three years we've been in this house and the tank was always just a bit on the cool side, even with the heater on max. I tried using a 100W (can't remember the brand), but even on the lowest setting it made the tank way too hot. I had planned on going with a 75W when the time came to get a new one, but the Marineland only come in 50W and 100W. Since it's a better quality heater, would the 100W be the best choice? The heater has to be able to raise the 20 gallon 10 degrees in winter.

 

[celaeno]

I'd get the 100w marineland stealth or stealth pro heater. if you want to be able to tell when the heater is on and doing it's job, go with the stealth pro.