UV plumbing and dual returns.

[BiCoastal]

Hello reefing community.

I have a UV plumbing question. I am planning my next tank. A Cade 1800 S2/peninusla. It will be arriving in January so currently gathering various pieces. So here is my question on UV. How do I plumb it!

Since I have two return lines, I can do two return pumps.

Essentially
Return flow path 1
Return pump 1 > return line > DT - running at say 750 GPH (about 3x the total volume)

Return flow path 2
Return pump 2 > UV > return line > DT - running at say 200 GPH roughly 1x turnover of volume which is a good flow rate for protozoans with a 55Watt UV unit.

Concerns.
Would it be that bunch of water will never pass the flow path 2 and thus never get sterilized?

I feel like I am missing something.

 

[MnFish1]

Hello reefing community.

I have a UV plumbing question. I am planning my next tank. A Cade 1800 S2/peninusla. It will be arriving in January so currently gathering various pieces. So here is my question on UV. How do I plumb it!

Since I have two return lines, I can do return pumps.

Essentially
Return flow path 1
Return pump > return line > DT - running at say 750 GPH (about 3x the total volume)

Return flow path 2
Return pump > UV > return line > DT - running at say 200 GPH roughly 1x turnover of volume which is a good flow rate for protozoans with a 55Watt UV unit.

Concerns.
Would it be that bunch of water will never pass the flow path 2 and thus never get sterilized?

I feel like I am missing something.

Everything will eventually go through the UV - however it will be 1/2 as much as if you plumbed the UV into one return - which would be ideal

 

[BiCoastal]

Everything will eventually go through the UV - however it will be 1/2 as much as if you plumbed the UV into one return - which would be ideal

If I plumbed both the returns to one pump, then the overall flow will be too little for the tank (at the suggested 200-230GPH for the fish parasites) that’s why I was thinking about using the two return lines separately with two return pumps.

 

[MnFish1]

If I plumbed both the returns to one pump, then the overall flow will be too little for the tank (at the suggested 200-230GPH for the fish parasites) that’s why I was thinking about using the two return lines separately with two return pumps.

However it works is best