Marineland Precision Heater for Saltwater or Freshwater Aquariums

I got a really nice price so I purchased this when my Cobalt Heater stopped working after a year. It seems for my long 20 gallon I need 150 watt even though the Marineland Chart shows 75 watt for 20 gallons would work. This came preset at 78. I plopped it in, let it sit for 20 minutes, then plugged it in. When I checked my manual thermostat, it read exactly 78 degrees after 6 hours or so. I turned it down 1 degree to 77 because it is winter currently and did not want it running more often. The water looks clearer and maybe that brown algae that started appearing will go away. Only kind of drawback is it is so big and can't touch gravel. It looks like something out of the Borg. And the long side because of weight I guess tends to dip the suction cup down a bit, and I can't keep it perfectly straight. But I was having trouble heating my tank so something this powerful was needed. The temperature on the heater is somewhat hard to read. I think it shows 76 when it should show 77 but that's why I have a backup thermostat in the tank.

Purchased this about 2 to 3 months ago. The heater would great in the beginning. Now I set the temperature to 80 and will reach 86. So it's pretty off in accuracy. The issue is Amazon will bot give me my refund all they can do is replace it with this same item which I no longer want any parts from Marineland. I have had a few issues with this manufacturer already. I've had a cracked 75 gallon tank, a canister filter for 75 gallon tank leak all over my living room just after 3 weeks, and now this heater. This items are not cheap to be buying and having issues and damaging parts of my home.

This may be the first time I submitted a negative review. The heater worked great for 3 months and stopped working, similar to what other reviews say. I just happened to notice my water temp was at 70 degrees and had to run to the store and grab a new heater. I bought a different brand this time.

Works great. Easy to set up. Preset at 77 , which is perfect. Love that it shows temperature.Would purchase again.

Firstly, I repurchased this after the first one went out, so any complaints aren't enough to keep me from coming back.I got 6 months out of the first one, and it failed without me noticing it. I only realized it had been out when I went to clean the tank and the water felt colder than it should. Fortunately, 70F wasn't too cold to kill the fish. It had been set to ~80F.That said... my experience is that in this price range, you're not buying something that's going to last forever. I would hope that I'd get more than 6 months, but I'm going to assume that my first one happened to be on the bottom end of the expected failure scale. As I previously mentioned, it's not extremely critical for this particular tank.Temperature control is via dial. It matches my separate thermometer, so accurate, but it's not very fined grained, so not overly precise. Again, this is acceptable for my application.Suction is great, haven't had any problems with it moving around or becoming detached.

Only brand heaters i use

I love this product. Cool looking, great design, easy and reliable to use. I had one of their first 100w versions made back in the early 90's. It lasted me through countless different tank set ups and break downs. I used it in Salt water, and Freshwater alike. Unfortunately, after 20 plus years, it finally showed signs of ware, with condensation and dripping forming on the inside. Not to mention I was last using 100wts on a 60 gallon tank. So after saying all that, I can not recommend enough.One problem.... It is beefier, bigger, longer, wider, then my 100w and with my aqua scaping, it does stick out. But that is a small issue comparatively.

I feel kind of bad going to Amazon for this- but I did not feel like driving 15-20 miles in traffic (to get to a big box pet store) and spending a lot of time driving to get there. I bought this heater for a 10 gallon quarantine tank because the backup heater I have shorted/broke. I was not in a hurry for this, but got it within a day anyways.The temperature is accurate and it is easy to dial in what temperature I need- in fahrenheit. My one complaint about almost all heaters like this is that I wish the clicks were more 'affirmative' at set distances- but this is something I can live with. I was able to quarantine the new fish correctly.Because of the hard water in my area I use a mix of 50% treated tap water and 50% reverse osmosis water using an RO system. I am fairly good at getting the temperature out of the faucet right, but sometimes I need to raise the temperature. This heater is able to stick (with the mount) to the inside of a homer bucket and heat the water that I am preparing. With some time and checking the water is simply poured into the tank. Not before I unplug the heater, of course.Happy with my unit.