Sfin's Dream.

[sfin52]

All rfa have settled in. They look great now it's just wait and see how they color up.

 

[sfin52]

 

[Goaway]

Do you know what event is going on with the motorcycles? I read one was for riding for vets, the other was racing... im not sure how well these bikes can rsce...

 

[sfin52]

 

[sfin52]

Do you know what event is going on with the motorcycles? I read one was for riding for vets, the other was racing... im not sure how well these bikes can rsce...

There was some type of event but not sure what.

 

[sfin52]

I just picked up a icecap 90w uv for 170. I'm wrestling with flow rate.
I read tank turnover rate at 0.5-1.5 times an hour. The instructions read for parasites 600ish gph.

Please can somebody help me wrap my head around this

 

[sfin52]

#cronnies

 

[Goaway]

I never played with a uv

 

[sfin52]

I never played with a uv

My first time.

 

[Stang67]

#Cronies anyone help with flow rate for uv?

 

[fishguy242]

run a 700 gph pump through it , should end up pretty close, can add a valve on exit if you want to throttle down at a later date ...

 

[fishguy242]

Setting the Flow Rate​

Flow rate is everything with a UV because it controls the contact time. The slower the water moves, the more contact time it has with the UV rays meaning the more effective those rays can be at killing things. That said, this also affects how many times per hour you can recycle the entire water volume through your UV per hour which is also important. The balance of these things will ultimately control the rate of sterilization.

A UV sterilizer should be tuned based on the particular goal because the level of sterilization required to kill bacteria and algae is different than what is required to kill common aquatic parasites.

Tuning Flow For Bacteria & Algae​

This would be designed to reduce cloudy water from bacteria blooms, inhibit cyanobacteria, and stop the spread of nuisance algae. The most common rate of flow for reducing bacteria and algae using a UV is 3x - 4.5x total tank volume per hour. For a 50 gallon tank, you should be moving 150 - 225 GPH through the UV sterilizer.

This just so happens to be the very common rate of turnover we run through our sump and return pump which works out for the common application of installation the UV inline using your return. You can choose the UV sterilizer based on these flow rate requirements for your particular tank.

Tuning Flow For Fish Parasites​

To target and kill Ich, Flukes and other common fish parasites is much more difficult and requires slower flow through the UV sterilizer which increases that contact time. As much as 50-75% less flow compared to killing off bacteria and algae. A turnover rate of 0.5x - 1.5x total tank volume per hour is generally the target. A 50-gallon tank would require 25 - 75 GPH through the UV sterilizer per hour to kill parasite.

In this case, you could increase the wattage of the UV sterilizer to accommodate the flow rate you have running through your sump/return pump or simply run a separate dedicated pump tuned to the slower flow rate.

 

[fishguy242]

90 gallon ? for parasites ? think much less 75-150 gph ?
that's what i'm getting from above directions for your uv...

 

[sfin52]

90 gallon ? for parasites ? think much less 75-150 gph ?
that's what i'm getting from above directions for your uv...

I understand that but I have a 90gal with a 90w unit. The recommended gph for parisites is 607 gph. Should I go with my tank volume or the recommendations for the the uv?

 

[sfin52]

11th

 

[fishguy242]

run a 700 gph pump through it , should end up pretty close, can add a valve on exit if you want to throttle down at a later date ...

going back to 1st thought, 650-700 gph pump through it

 

[sfin52]

going back to 1st thought, 650-700 gph pump through it

This is why I'm confused. My pump is 607 gph with out head pressure

 

[fishguy242]

your looking for 630 , 650 - 700 will account for unit and plumbing head loss

 

[Nate Chalk]

My UV I went with longer exposure time. Always killing parasites, and bacteria. 24/7 no issues , oversized too

55w jabeo
With like a sicce 100 . It's small

 

[Projects with Sam]

If tuned for ich it’ll also get bacteria and algae just not as effectively because less water will be cycling