I was leery of this because of some reviews but it works well. The only draw back is it is not adjustable, and the price is too high for a low watt heater. I got a heater twice the size for 4 dollars more, but online. Tetra makes great products for fish keepers on a budget, but this heater could be 10 dollars since it only heats tanks 5-15 g. But it does have an indicator light (unlike even expensive heaters) and keeps the water very even. The compact casing does wonders to keep it safe, but the packaging NEEDS to be adjusted. the case is open to break right in the store, and I have found some broken. I mean there is not even plastic between the box and the heater. So pick out one carefully. If it adjusted and was less expensive it's would be a killer heater. Very good for anyone looking for a betta, or smaller 10 g heater.
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