Heating problems

[HAVAMAL]

I have a 10w heater in there and there's only around 6gal of water but I can't get the temp to regulate higher than 64°, ideas?

Here's the specs

Tank # 2
Oceanic
42 gallon 'hexagon'
Measurements
168 liter: 25 inch by 22 inch by 23 1/2 inches high

Lighting-
Marineland LED Light Strip

Tetra waterfall setup

Species


Plants
1 Marimo ball
3 Spiral Bamboo
1 Amazon Sword
3 White Ribbon
4 Umbrella Plants

Heater
10W

 

[Fishkeeper26]

Why do you have the water so low? Im guessing there's not enough water circulation

 

[HAVAMAL]

I run the tank with a tetra waterfall system, half land half water, so there's circulation, I'm thinking maybe if I go back to a Flo. Light the heat from the bulb just might do the trick?

 

[BHead707]

well my guess is the heater isn't beastly enough, usually people go minimum a 50watt for 10 gallons, so imo it seems a little small