I'm fine with an in sump option, external sitting on sump alternative, or going with inline, as I can just plum it into my purigen/total nitrate reactor.
I'm fine with an in sump option, external sitting on sump alternative, or going with inline, as I can just plum it into my purigen/total nitrate reactor.
The right sizing of the unit depends on what level of sterilization you are trying to accomplish.
I prefer inline UV units for safety and ease of maintenance.
The right sizing of the unit depends on what level of sterilization you are trying to accomplish.
I prefer inline UV units for safety and ease of maintenance.
The size of the UV is not as important as the contact time of UV with water. for 200 gallon tank I would push around 500gph through a 55 watt UV to eradicate free floating algae. Higher flow reduces the contact time thus reducing the effectiveness. I aim and most suggest around 10x wattage output for flow through the UV.
UV will not eradicate parasites such as ich. UV does reduce stress on fish which improves their immune system helping them fend off disease and infection.
For a 58W @ 500 gph on a 250g tank. Dosage is 2x 45.84 = 91.68 mJ/cm^2. This will take care of most pathogens.
As you can see on the chart, algae only needs 22 mJ/cm^2