04-07-2010, 11:09 AM
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Originally Posted by Aimee
They are all doing fine at the moment. I am currently not in a position to purchase another tank etc so I am going to have to keep it is it is. I have been watching the tank and its been more like 74 - 78 fluctuating, it doesnt actually drop into the 72 or go up to the 80. The other cory fish I have are bronze and 2 pepper. They are doing fab as far as I can see. They are quite active (especially the bronze) then they lie on the bottom (as far as I can see sleeping) for a little while, then start again lol. My house is not a cold house so it takes a LONG time for the temp to drop to 74 anyway so it's not like the temp is seriously dropping and quickly iykwim. I am just worried about the Betta now, although seems to be doing fine, active and not gasping for air or anything like that. What do I have to look out for if it gets stressed?
In this situation I would set the tank temperature at 77-78F and leave it there. The betta is the only fish I would worry about; some sources give 78 as a minimum temperature, so maybe it will manage. The white clouds are tough little fish and might be OK, though may not live as long.
Stressed fish appear un-natural. The longer we keep fish the quicker it is to notice signs of this. Fish that are in a cooler water temp than they prefer may become less active, sluggish, fins might be clamped a bit, may have less interest in food and things in general, sort of just sitting there or swimming lazily. They may be more intimidated by other active fish. Betta also must breathe air from the surface, so the tank should be covered to ensure the air above the water is moist and warm.
By contrast, when temp is too high the fish generally have difficulty respirating as warm water contains less dissolved oxygen and cooler water fish are generally more active so they need oxygen; these may become lethargic, spend more time at the surface, also not have much interest in anything including food.