Plumbing Confirmation Please

[User7007]

Hello
New to R2R but I have been apart of fish keeping in my part of the woods. Unfortunately, local experince is very minimal and most active fish keepers are koi owners.
I have many questions but this is the direction I am choosing due to budget.

Plumbing for 75g, Marineland tank with 40g breeder refug. Fish and Coral (easy starter corals for now; bubble, torch, mush, candy, etc)
Drians
Drains: 2 drains holes at 1.5inch for sch 40 bulk fitting=> purchasing 60mm diamond drill bit.
Question: What should the spacing between the holes be and how far down from the trim? I kinda find a mix of answers to this.

Question: I understand that minimal flow rate should be 750g at 10x per hour; various resources saying I should reach 1600gph due to some corals. Does two 1.5 inch sch 40 bulk heads sound correct? 1 bulkhead being main drain and the other is emergancy drain. I understand 1.5inch can approx offer 2000gph by gravity feed and my return pump can offer approx 1000gph minue head pressure (approx 3 feet and 1 90degree). Taking all this into account, my max gravity feed rate will only be equal to my max return flow rates... So in reality, either two 1.25 or 1.5 inch bulkheads should work corrct? And should I return line a 1inch bulk?

Question: If my two 1.5inch sch 40 drain bulkheads are correct and match with my return of approx 900gph than my 40g breeder refug would match wonderfully?

PS. Yes, I do understand if my tank can be drilled... According to marinelands website it can be and according to the polarized test it can be... Lots of building experince and now building inspector.
Thank you for your response.

 

[Subsea]

@User7007
I see this is your first post to r2r. Merry Christmas and welcome to the addiction.

Your math is fine. I used a 3/4” return line from sump pump to display as I don’t see the necessity in maximizing flow to sump. I choose to maximize flow in display. No matter how many drains you plumb, test out a power failure scenario to see that your sump does not overflow. I drilled a syphon break on return line to display.


Go for the gusto.

 

[ShakeyGizzard]

10 x turn over rate is a lot of flow, I shoot for 3 to 5 turn over per hour. I use an overflow box. 3/4 return with 1 inch drain. Also welcome to reef2reef. You might want to go here Meet and Greet Forum and say hello to everyone.

 

[Bruttall]

1.5 under full siphon drains a lot more than 2000gph. I run 2x 1.5 inch drains in my 300g and I have a 3100gph return pump. One is full siphon and it handles all but the barest trickle which comes thru the second, or Emergency Overflow drain.

 

[User7007]

Hello
First, thank you to each that responded. I was not very clear but I assume that by each answer you all have an idea of what I ment.
Here is the two overflows im debating: they should come with the bits correct? On the reviews it stated it does and on other sites that post the product details it states item includes drill bit but the description on this site sucks! We are always limited in Canada for gear and really overpriced as usaully with a lovly high tax value.
Med Overflow
Large Overflow
Options 2 Large Overflow => I can get this from reefsupplies.ca for $203.00 vs $237.00

Its boxing day so I will be looking to purchases sooner than later!

Questions: Can I get an opinion on which I should purchase? I did like the idea of the 2nd Large overflow option as it has water level adjustment..

Questions: My return pump is: 2640GPH MAX, I ran it on my 80 gallon oscor tank and it seemed just acceptable. My fluval FX5 had better flow actually but I did put my pump through hell in my UV, Home made filter bucket and Whole house high flow polisher filter. That pump will be restricted to flow rates significantly if I am to run 3/4 return to pair with an overflow box of 1inch drainline. Does this all still sound okay or whats your guys opinions? The pump comes standard with 2inch thread attachements. Does it make sense to maybe split the return and run two points of return entry to the tank or am I just complicating it? I was planing on tank flow to correct or balance flow rates etc.

I am never seeking people opinions but as I get older I am learning to inquire more and more from others; knowing this, I do appreciate the time and effort for the response!

 

[ShakeyGizzard]

I'm no pro, but the large Overflow should be plenty. High return flow would cover a lot of the flow needs in the tank. I would look to split the loc line in the tank with 2 nozzles. 500 gph in a 75 gallon is a lot of flow

 

[User7007]

I'm no pro, but the large Overflow should be plenty. High return flow would cover a lot of the flow needs in the tank. I would look to split the loc line in the tank with 2 nozzles. 500 gph in a 75 gallon is a lot of flow

Hello,
Yes I have a split loc line for dual flow nozzle; going this route would allow me 1 drilled return and focusing on in-tank flow to compensate the remainder flow for corals down the rd.
I have the larger one that requires two drilled holes in the tank in my shopping cart. The other max rating is for 100gallons; were the large is something up to 150max so makes alot of sense to me too!
Thank you!

 

[User7007]

Im going to create a post on Sump as I have a few quick questions for that. Should post sometime tonight. Thank you for the time responding.

 

[Shirak]

You want one of the large overflows so it has the 3 drain lines. That way you can run a bean animal drain system. Don't worry so much about crazy flow through the drain and return. 3-5x turn over is plenty for your sump. If you make it much more it will be raging river through your sump. The flow in the tank for the corals is handled by the flow pumps, wave makers etc.

DC controllable return pump so you can set the flow through through the sump. Gate valve on the main drain line so you can tune flow through the main drain and keep it running a full syphon so it will be quiet.

 

[User7007]

You want one of the large overflows so it has the 3 drain lines. That way you can run a bean animal drain system. Don't worry so much about crazy flow through the drain and return. 3-5x turn over is plenty for your sump. If you make it much more it will be raging river through your sump. The flow in the tank for the corals is handled by the flow pumps, wave makers etc.

DC controllable return pump so you can set the flow through through the sump. Gate valve on the main drain line so you can tune flow through the main drain and keep it running a full syphon so it will be quiet.

Thank you for your response. I just purchased the large overflow to run the bean animal drain system. I do have the DC contrllable return pump. I totally forgot about the gate valve on the main drain. I had one on my othertank, just have so much hobby's on the go (27 reptiles, 3 torts, snakes) etc etc etc etc.

Its been a long time since I ran a reef tank and alot has changed. I had MH/compacts, actual reef harvest live rock etc. Been watching the BRS tv, pretty much exhausted it by now and my original apparoch is changing big time now.
Thank you!