Help with water temp

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BaTsBR

Gambusia
MFK Member
Mar 18, 2008
688
0
16
Brasil
Hey guys and girls
I need some help.
These days the temp aroun here are lowing, its becoming more colder.
Well, I got a tank with 700 liters, about 180g., and the temp is about 20°C.
How can I get it warmer, without doing any harm to my fishes ?? There is 2 gigas, 1 tsn and a lot of lambaris (feeders).
Just some termostats don't solve my problem, i think
It was said to me to use that bubble plastic (the one we use to protect some things in trips, that everyone enjoys to pop) over the tank, so when the sun reaches it, it gets the water warmer.

please, help me, I don't wanna lose my two gigas
 
I'll check some prices around here
thanks man, if it doesn't work, I'll say it
 
just bought an 300w termostat, hope it gets the water warmer.
 
I HAVE A 300 WATT TITANIUM HEATER KEEPS MY 300GL AT 82
 
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