hi im intrested to know do u discus owners have your heater set over 80 like they say. its just i see discus quite oftern at aquatics and i see the temperature is the same as other tropicals in that safe green zone. i wonder do discus really need that extra heat? there was an orange discus i saw 75pounds price and the bloke there said discus dont really need that high heat. what are your veiws? thanks.