Guppies Going Crazy!

[SimonSays]

My guppies seems to be freaking out, they'll swim to the stop and then nose dive down, then rest on the gravel, then swim up, do another nose dive...my otto's are also swimming around like mad...the same thing happened yesterday and i did a 50% change with a gravel vac...they seem to be hitting the rocks and side of the tank hard =/


Tank stats:

10 gallon
3 female guppies
1 male
3 Ottos

ph: 7.6
Ammonia: 0
Nitrite: 0
Nitrate: 5

 

[for_my_fish]

did you use declorinator/heavy metals remover with the water change. could be clorine or metals in the water irritating them

 

[SimonSays]

yep, I used dechlorinator, I think i've figured it out...in the US, theres been a crazy cold front and temps have been dropping from 85C to about 30C in one day...I think the sudden drop in temp was the culprit, I tossed in a heater and they seem to be doing fine now!