rainman

no there underwater heaters (tetra wisper's) to be exact suck.
I bought 1 30 gal. heater and it only heats my tank up to 72 degrees!

pistorta

I have always gone with Ebo Jager heaters and have never regretted it.

hssea

my teenage daughter has a tank in her room, she was out of town for a few days. The second day i went into her room to feed the fish , they were all dead. The temp was at 100 and the heater light was still on. All 11 of these fish were 2 years old that were raised from fry's (swordtails). It was so sad. I felt bad thinking if i checked on them sooner maybe i would have caught it in time. Between living here in Mi and Tx I've had over 20 years of fishkeeping and never had a heater get stuck like that. Needless to say that went straight into trash so i don't remember the brand name. I did purchase it at Walmart though. I'm looking into replacing my other two tanks with new heaters since these also came from Walmart.

Tavel

the walmart heaters (aka tetra whisper, aka Top Fin) are straight up sucky. They work fine for a while, but the thermostats always get stuck on. My tank got to 90F one day...I only lost one fish though.

COBettaCouple

We lost a tank of Albino Bushynose Plecos to a stupid walmart heater that cooked them.

KittieKat

i have owned cheap and expensive heaters... i like being able to change the temp whenever i feel like it but i have honestly NEVER had a problem with a walmart heater...