blueether Posted June 20, 2013 Report Share Posted June 20, 2013 Came home for lunch to day to find that the native tank was covered in condensation, so I checked the temp thinking it might be down to 15 deg. Got s shock when I saw 4 deg, so checked with another and 4.0 deg. Temp on the chiller still read 19 and the chiller was running full steam I have lost two fish so far, one smelt (the others are looking very stressed) and the troublesome algae eater that was re-homed. I hope that the bottom dwellers will be ok as they are hardly breathing - I guess that the extra warmth from the midwater fish swiming has helped the kokopu and smelt but they still looked stressed... Quote Link to comment Share on other sites More sharing options...
calculator Posted June 20, 2013 Report Share Posted June 20, 2013 A boken thermostat, one of the worst nightmares for what could happen to my fish. I hope the rest of your fish recover fine. Quote Link to comment Share on other sites More sharing options...
livingart Posted June 20, 2013 Report Share Posted June 20, 2013 :ske: &c:ry Quote Link to comment Share on other sites More sharing options...
Jaide Posted June 20, 2013 Report Share Posted June 20, 2013 That's very sad news - sorry to hear that I'm always paranoid that my heaters will fail so regularly touch the tanks to check the temp. Quote Link to comment Share on other sites More sharing options...
Ira Posted June 20, 2013 Report Share Posted June 20, 2013 Huh, Hear all the time about heaters sticking on and cooking fish. First time I've heard of a chiller sticking on and freezing them. :-? Quote Link to comment Share on other sites More sharing options...
reptilez Posted June 20, 2013 Report Share Posted June 20, 2013 Oh no, that is terrible &c:ry Quote Link to comment Share on other sites More sharing options...
disgustipated Posted June 20, 2013 Report Share Posted June 20, 2013 i'm not a clever man. but i thought nz natives would be able to handle such a low temperature, since they live in rivers that get really really cold. is 4 degrees just too cold, or was it the sudden change in temp? :dno: Quote Link to comment Share on other sites More sharing options...
blueether Posted June 20, 2013 Author Report Share Posted June 20, 2013 I think it was the controller as after a power cycle it read the correct temp. I'm sure the temp was 18.2 last night when I fed them One of the fish was the CAE so I suspect that they don't like temps that cold, the mullet as a warmer water fish, and for the others I suspect that it was the quick drop in temp - 15 deg in about 15 hours. Have had a 150w heater in there since lunchtime and the temp has lifted to ~9.5 deg. Have taken it out now and will let the temp continue more slowly. Everything else is looking better now, but will have to watch for disease in the next week or two. Quote Link to comment Share on other sites More sharing options...
blueether Posted June 21, 2013 Author Report Share Posted June 21, 2013 Update on the fish - everyone else is still alive as far as I can tell and looking OK. Temp is slowly climbing back up, now at 13.5. Quote Link to comment Share on other sites More sharing options...
calculator Posted June 21, 2013 Report Share Posted June 21, 2013 Sounding good, they should survive now as they have survived so far. Quote Link to comment Share on other sites More sharing options...
blueether Posted June 21, 2013 Author Report Share Posted June 21, 2013 just seen that one of the smelt has a cloudy eye so I'm adding some rocksalt to about 3 or 4 ppt Quote Link to comment Share on other sites More sharing options...
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