Looking at UV filter for 750g System

[dr exum]

i’ve never ran a real one of these - got a little aquatop one for 50g tank @200gph or something

looking at one of these life guard units that sits horizontal -

question :
not sure of the 3” vs 5” and 90 watt seems to be enough vs the 120watt .

if i’m reading this right i need a pump around 3000gph - seems like a lot of flow...

for consideration i already have around 5500gph (6200gph before head loss)

mp40’s x 2 - or 9000gph - they only run that speed for 4 hours per day...

if i add anther 3000gph seems like a lot... is it excessive?

i could run it off one of my pumps, gonna restrict flow more, and if i have to put meds in tank can’t unusually run UV -

looking for UV solutions for system -

i have 2 fx4’s i could use for the flow to uv filter, buy another L2, or other pump

thanks all!

 

[kendragon]

Just be aware that amalgam lamps run a lot hotter. They are more intense than standard UV lamps even though both are low pressure. Make sure you size it correctly or you run the risk of over heating the tank water.

 

[phreeflow]

Run it off the outflow of the fx4 or a separate pump. Mp40’s won’t work and plumbing it to your main pump will slow it down. Just unplug the uv when running meds

 

[dr exum]

Run it off the outflow of the fx4 or a separate pump. Mp40’s won’t work and plumbing it to your main pump will slow it down. Just unplug the uv when running meds

even though the rate of the fx4 is 700gph?

looks like UV is wanting 2800gph min

 

[dr exum]

what’s the bacterial / parasite mode vs alge/cyno bactéria control mode?

sterilize vs alge control.

 

[kendragon]

what’s the bacterial / parasite mode vs alge/cyno bactéria control mode?

sterilize vs alge control.

Best way to explain it is by UV dosage. You should have a purpose or target kill. Otherwise, one would be winging it.
Each pathogen/algae requires a certain UV dosage to kill it. Algae requires very little. Try to not get in the mind set that if you slow down the flow you will get a higher dosage. If the wattage is too low, slow flow may still not get the dosage you need.

 

[dr exum]

would one take from the chart here 318000 - uv dosage it would cover everything?

i’d like to sterilize the water as much as possible that’s good for the fish -

ie: kill any virus/ bad bacteria

also alge...

question : these things don’t crash folks cycles?

i guess i’m stuck on the flow rate too -

i can get two smaller units and use the fx4 out puts (not enough for my 750g)

or it appears buy a 4000gph pump and get down with it.... ?

 

[kendragon]

would one take from the chart here 318000 - uv dosage it would cover everything?

i’d like to sterilize the water as much as possible that’s good for the fish -

ie: kill any virus/ bad bacteria

also alge...

question : these things don’t crash folks cycles?

i guess i’m stuck on the flow rate too -

i can get two smaller units and use the fx4 out puts (not enough for my 750g)

or it appears buy a 4000gph pump and get down with it.... ?

I think 318 mJ/cm^2 that is too extreme. Most system designer and builder only require 50 mJ/cm^2.
Emperor Aquatic is advertising 200mJ/cm^2 @ 420 gph for their high output unit but most likely for a tank around 400g.

The Pro Max Amalgam 90 states 30mW/cm^2 @ 2800 gph. Coupled with the hydraulic residence time, the fluence UV dosage equates to 91.799mJ/cm^2 which they claim is for a 650g tank.

 

[dr exum]

I think 318 mJ/cm^2 that is too extreme. Most system designer and builder only require 50 mJ/cm^2.
Emperor Aquatic is advertising 200mJ/cm^2 @ 420 gph for their high output unit but most likely for a tank around 400g.

The Pro Max Amalgam 90 states 30mW/cm^2 @ 2800 gph. Coupled with the hydraulic residence time, the fluence UV dosage equates to 91.799mJ/cm^2 which they claim is for a 650g tank.

i clearly need to do a bunch more research...

seems kind of math heavy ?

seems like a pro max 90 and a 4000gph or 2850gph pump? and i adjust the flow depending on what i’m looking to kill?

 

[kendragon]

Keep in mind that most standard UV uses a 2" dia chamber. This is to keep the pathogen close to the quartz sleeve. Effectiveness drops as you move away.
High output/Amalgam uses 5" dia chamber to prevent overheating. So ave mW/cm^2 is actually lower.
Large displays that require very large pumps (flow) have 12"+ dia chambers with multiple lamps. Pathogen distance from the lamp is still maintained.