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Silly question but...

Subject: Silly question but...
by rachyw82 on 24/1/2010 14:42:30

...my tank lights are on a timer to come on at 3pm and go off at 11pm. This gives 8 hours of full spectrum lighting plus the few hours natural light before they come on.

Now I've got them into a good routine of when the tank lights go out, the room lamp stays on for half an hour or so, then it's total darkness for sleep time. If me & the OH have come home late, we try not to go into the lounge and disturb the fish (daft I know), but I feel it would shock them.

Anyway, last night we had friends over and were all up until 4.30am! The fish were active all night as always. But today, they seem a lot slower, more lethargic, and sitting on the gravel. They never do this except bedtime! None of them are fin clamping and I've performed full water tests on both tanks which are perfect (although nitrates are at 20 in my moors tank which I'm a little uneasy with as it's usually 10).

My daft question is, can fish get so used to routine that they can be tired out the next day if they've been active for longer, just like we do when we've had a late night out and are tired the next day? I just find it a bit odd how all my fish appear to be resting.

I'll have to wait & see what happens when the tank lights come on