
The picture is what UTH I use on my tank. It does not heat it up well alone it says it can range from 4w-24w but it only feels like 4w how can I range it to 24w? The highest temp with just the UTH is 68 F which i need around 85. Anyone got tips about heat I bought a second one with the intention of having extra heat but I was told I should consider buying a 30-40 UTH for increased heat
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