UV advice

[IIDRYWATERII]

Hi

Can someone tell me which would be better to get between the following.

D-D complete 48w UVC unit
D-D complete 20w UVC unit ( equivalent to 40w uv ) 1000lts/hr

My total system volume is 832 litres

Currently got an algae bloom cause be temp spike as I was away… temps was at 29 degree c for 4 days…

Says the 20w is from 600-1000 litre reef

Thanks

 

[Waters]

I am not familiar with those models but I would always go with the larger watt unit. That being said, UV won't do much for algae issues unless you are talking about free floating spores (green water).

 

[IIDRYWATERII]

I am not familiar with those models but I would always go with the larger watt unit. That being said, UV won't do much for algae issues unless you are talking about free floating spores (green water).

Hi ye it’s the free floating I’ve currently got.

 

[IIDRYWATERII]

Was thinking the 20wuvc which says is equivalent to 48w uv as this has a slower flow rate maxed out at 1000… The bigger one has a maxed out flow at 2400lts/hr.

 

[Waters]

Was thinking the 20wuvc which says is equivalent to 48w uv as this has a slower flow rate maxed out at 1000… The bigger one has a maxed out flow at 2400lts/hr.

I never really put much faith into the flow rates given by the manufacturers. UV effectiveness is determined by bulb strength and water contact time with light. Contact time can be changed with pump strength (larger enclosures make this easier allowing for longer contact times....some manufacturers also have turbo twist designs which is supposed to increase contact time). Bulb strength cannot be changed, which is why I always go with the stronger watt bulb.

 

[BryanM]

I would also go with the larger unit if it were me.