I have merged two threads as they had the same first post. Unfortunately this makes the replies a bit disjointed, but I wanted to have all the replies together in the same thread.
That's great, I couldn't figure out how to delete one as I accidentally posted it twice.?I have merged two threads as they had the same first post. Unfortunately this makes the replies a bit disjointed, but I wanted to have all the replies together in the same thread.
A 150 watt heater might not be powerful enough for a 200 litre tank. I would look at a 200 or 300 watt heater.
If you find the heaters can't keep the water at 86F, insulate the outside of the tank with 1 inch thick polystyrene foam sheets. Just tape them to the outside on the back and sides.
Have a cover glass on the tank too. Get coverglass that is 4, 5 or 6mm thick. The thicker glass is less likely to chip or crack, and coverglass do a great job at trapping heat in the tank.
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Depending on what the water temperature is, I would try to get it up to 86F asap. If it's normally around 80F, just take it up to 86F in 1 day.
If you are using heat to treat white spot, you don't add chemicals or salt. Just let the heat do the job.