27ºC is too low?

[Alex Costa]

Hello to all.

I'm keeping my 800 litters tank with 3 adults and 5 juvs at 28º~28,5ºC, but the beginning of the Winter is making my heaters keep ON most part of the day.
In my experience with marine tanks, to drop down the temp by a 1ºC allows the heaters stay OFF a little bit more time.
So my doubt is: 27º is too cold for discus? Will it cause some harm some?

Regards,
Alex Costa

[White Worm]

The adults won't mind but the smaller ones like it a bit warmer to up their metabolism, appetite and growth.