Raising temperature
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xxkenny90xx
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But why?
Reefing_addiction
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I second that
Why?
Why?
OP
OP
Temperature tolerances of toxic dinoflagellate cysts: application to the treatment of ships' ballast water
Abstract
Using toxic dinoflagellates and their resistant resting cysts as model organisms, we demonstrate the potential of heat treatment as a method to minimise the transport of harmful aquatic organisms via ships' ballast water. Vegetative dinoflagellate cultures of Gymnodinium catenatum could be readily killed using temperatures as low as 35 °C and treatment times in the range 30 minutes to 5 h. The resistant resting cysts (hypnozygotes) of G. catenatum were killed after 2 h at 35 °C and the cysts of Alexandrium catenella were killed after 4.5 h at 38 °C . A careful assessment of various waste heat sources on the BHP bulk carrier ‘Iron Whyalla’ has confirmed the practicability of this approach, and a successful pilot heat treatment plant was trialled on-board ship in April 1997.
Abstract
Using toxic dinoflagellates and their resistant resting cysts as model organisms, we demonstrate the potential of heat treatment as a method to minimise the transport of harmful aquatic organisms via ships' ballast water. Vegetative dinoflagellate cultures of Gymnodinium catenatum could be readily killed using temperatures as low as 35 °C and treatment times in the range 30 minutes to 5 h. The resistant resting cysts (hypnozygotes) of G. catenatum were killed after 2 h at 35 °C and the cysts of Alexandrium catenella were killed after 4.5 h at 38 °C . A careful assessment of various waste heat sources on the BHP bulk carrier ‘Iron Whyalla’ has confirmed the practicability of this approach, and a successful pilot heat treatment plant was trialled on-board ship in April 1997.
Reefing_addiction
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Umm and what about your other occupants?
This would very likely kill everything in your tank possibly including your beneficial bacteria.
OP
OP
Heres some quotes ive found it seems risky anything over 90f.
If you do raise it to 35c (95f) I would take everything out of the tank except the water! That way when you bring it back down to normal everything will be alive instead of dead. I would look at some other option to conquer your dilemma.
jccaclimber
Active Member
I’ve seen a full LPS/softie reef crash somewhere in the low 90’s. Middle of winter and a neighbor’s apartment thermostat went haywire while he was gone for a weekend. Everything other than maybe o e fish died. On the flip side I knew a guy whose tank would hit 85-86 daily in the summer. SPS dominant reef that did great.
So, plausible yes, but I wouldn’t try it until I had exhausted other options.
Have you ensured your phosphate isn’t bottomed out?
So, plausible yes, but I wouldn’t try it until I had exhausted other options.
Have you ensured your phosphate isn’t bottomed out?
Robert Ranciato
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I recently read a article about someone who accidentally raised the temperature in there tank and it killed off all Dinoflagellates.
Randy Holmes-Farley
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It seems unlikely to me to be able to selectively kill only dinos. The first sentence of the researchers paper says they selected them as a model for how to kill everything in the ballast hold.
Bro, don’t do that. You’re gonna kill your coral, fish, bacteria, algae, et cetera. Yeah maybe other people’s aquariums survived like that for a little while but that was by the grace of God... don’t test God... XD
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I just read the answers to your question. I agree, experimenting on an entire system is a bit too risky. But let’s play with the idea anyway.
If the dinos are in the water column, could you pass the system water through a short loop where it is heated and then cooled before returning to the aquarium? High temperature for a short time might work. It would definitely disturb everything else passing through the heated coil, but how is that different from a UV light?
If the dinos are on surfaces and don’t spend much time in the water column, you need a local treatment. Speaking of UV, has anyone tried holding a water proof UV lamp over a patch of dinos to kill them? For A local heat treatment, you would need a heated plate that you could hold against the dino patch to make locale bad for them.
Off topic a bit, but I wondered if anyone has injected a bottled bacteria into a dino patch to directly inoculate it at the site if infection. Ditto for a cyano patch.
Many problems to address with any new approach. Keep exploring or better yet try some experiments - outside the aquarium of course
Dan
jccaclimber
Active Member
There is precedent in freshwater using temperature in conditions that it kills the parasite while still being just inside what the livestock can handle. At the risk of desensitizing the pest I would take my tank and give it a daily swing to say 84 °F, then the next week 85 °F, and go one degree higher every day. This would give the coral a month to get used to it. If you see a point at which the dinos die, you stop. If you see a point at which the livestock is suffering, you stop.
I think the dinos are surface based, which, ignoring the massive energy requirement to heat and cool all return water that much, would mean they survive. For surfaces I'm worried about surfaces you can't see. A laser would be a way to locally heat surfaces, but would almost certainly be far from eye safe at the power required to heat any decent area enough to kill off the dinos on a patch of rock.
I've seen some people encouraging diatom blooms as a way to eradicate dinos, so there may be a silicate or phosphate dosing solution to this that carries less risk to the rest of the livestock.
I think the dinos are surface based, which, ignoring the massive energy requirement to heat and cool all return water that much, would mean they survive. For surfaces I'm worried about surfaces you can't see. A laser would be a way to locally heat surfaces, but would almost certainly be far from eye safe at the power required to heat any decent area enough to kill off the dinos on a patch of rock.
I've seen some people encouraging diatom blooms as a way to eradicate dinos, so there may be a silicate or phosphate dosing solution to this that carries less risk to the rest of the livestock.
OP
OP
Yes i think 35 c may be too high for my liking. But i may try to reach 90f. Whats your thoughts on 90f?
My yellow tang was covered in the strings today lol.
My yellow tang was covered in the strings today lol.
lagoonreef
New Member
Better not to do that, it is going to damage the complete ecosystems
jccaclimber
Active Member
I think it's pushing your luck, but not a guarantee either way (death for all vs. solving the problem). Any temperature above the low to mid 80's I would recommend approaching as described in post #17.
I'm also not convinced you cannot beat this in a reasonably short period of time with a nutrient shift. Have you performed phosphate/nitrate tests?
I'm also not convinced you cannot beat this in a reasonably short period of time with a nutrient shift. Have you performed phosphate/nitrate tests?
