The tank is 2meterX60cmX40cm. I got a 300w and a 200w in it. The catfish broke my 500watt heater so thats why I got 2 heaters in there for now.How big is the tank? Buy a aqueon heater 300w in amazon, its under $25 also buy a heater guard to protect the glass heater from breaking so the catfish cant break it.
I was thinking about putting them on different sides of the tank. But I thought in the nature its warmer on the banks of the river then in the deeper parts. So I put them both on the left side knowing that it will be a little cooler on the other side. But thats no good I take?