Marineland Precision Submersible Aquarium Heater - ML90650

from Tetra

Had it for a week and a half and it filled with condensation and quit working. My tank, canister filter and power head are all Marineland and have been very happy, but this Marineland product let me down.

from SDGrilli

I bought the 300 watt heater, set it to 72 degrees and two days later my water temp was 100 degrees and all my fish were dead. This was a recommended heater from Petsmart. It is tough when you have had a healthy aquarium for 8 years and in two days the entire system is wiped out. The loss is f...

from SarahSK

I bought this 5 months ago and it worked okay, but it ran very hot. Then I noticed an extreme amount of condensation inside. I returned it because condensation shouldn't happen that soon. It's been less than a day and it's already beginning to have condensation. I am very unhappy with this product.

from Debra

I received the item fast and I am using the Marineland one right now and so far it is working great, but I still haven't received my full refund for the Christmas gift cards that I ordered from Walmart and never received as of yet.

from jclaib

I've purchased two and both have condensation INSIDE the unit within a week. This is extremely worrisome to me.