Different UV dosages for protozoans. Which one?

[Andynz2000]

Currently thinking about getting a aqua UV 25watt twistfor my 31 gal, 800gph return pump (adjustable)

Im getting confusing UV dosage rates for ich. Is it 90000, or 280000?

 

[Jay Hemdal Verified Community Expert]

Currently thinking about getting a aqua UV 25watt twistfor my 31 gal, 800gph return pump (adjustable)

Im getting confusing UV dosage rates for ich. Is it 90000, or 280000?

I've always used at least 280,000 uW/sec/cm2. The lower dose given is for freshwater ich, a different species. Here is a good read on this:

Use of ultraviolet (UV) sterilization to kill theronts has been suggested, based on research involving Ichthyophthirius multifiliis (freshwater "ich"). The recommended UV dose for Ichthyophthirius theronts is 100,000 µWsec/cm2 (Hoffman 1974). However, UV doses required for Cryptocaryon irritans are anecdotal or extrapolated, and range from 280,000 µWsec/cm2 (industry numbers) to 800,000 µWsec/cm2 (Colorni and Burgess 1997).

Theronts must go through the UV sterilization unit in order to be exposed, so any theronts that are not exposed to UV radiation and remain in the tank or holding areas will be unaffected. Similarly, encysted tomonts within the tank or holding area will not be affected.

That text was written by Dr. Roy Yanong, and the full text is here:

FA164/FA164: Cryptocaryon irritans Infections (Marine White Spot Disease) in Fish

University of Florida, Institute of Food and Agricultural Sciences Extension outreach is a partnership between state, federal, and county governments to provide scientific knowledge and expertise to the public. The University of Florida (UF), together with Florida A&M University (FAMU)...

edis.ifas.ufl.edu

Jay Hemdal

 

[Andynz2000]

I've always used at least 280,000 uW/sec/cm2. The lower dose given is for freshwater ich, a different species. Here is a good read on this:

Use of ultraviolet (UV) sterilization to kill theronts has been suggested, based on research involving Ichthyophthirius multifiliis (freshwater "ich"). The recommended UV dose for Ichthyophthirius theronts is 100,000 µWsec/cm2 (Hoffman 1974). However, UV doses required for Cryptocaryon irritans are anecdotal or extrapolated, and range from 280,000 µWsec/cm2 (industry numbers) to 800,000 µWsec/cm2 (Colorni and Burgess 1997).

Theronts must go through the UV sterilization unit in order to be exposed, so any theronts that are not exposed to UV radiation and remain in the tank or holding areas will be unaffected. Similarly, encysted tomonts within the tank or holding area will not be affected.

That text was written by Dr. Roy Yanong, and the full text is here:

FA164/FA164: Cryptocaryon irritans Infections (Marine White Spot Disease) in Fish

University of Florida, Institute of Food and Agricultural Sciences Extension outreach is a partnership between state, federal, and county governments to provide scientific knowledge and expertise to the public. The University of Florida (UF), together with Florida A&M University (FAMU)...

edis.ifas.ufl.edu

Jay Hemdal

I think Ill be able to target both the 280,000 for the ich and the tank turn over for algae with this 25w then. for 280,000 i need 500Liters per hour, and my tank is around 120-130liters

 

[Andynz2000]

what does "UV’s rated at higher kill rates will destroy the planktonic food supply for the reef" mean? Im running 280,000 now.does this mean I have to dose phytoplankon into the display?