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  1. #1
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    Eric's Red Sea XXL 750

    Here is my new build thread for my RedSea Reefer XXL 750! I currently have a 90gl that I've had up and running for over a year now. Love the tank, but after a year of lugging buckets up the stairs, a few water spills, and a loud overflow, I decided I had enough of a reason to build out a new system. Most everything except the sand from the 90 will be going into the new tank.
    All photos of this build are housed here: https://www.flickr.com/photos/288232...57704166244844

    Tank came in last week and is currently in my garage on moving dollys (each supports 800lbs, if I had a ramp I could push this in the house myself)





    Basement sump setup plan will look something like this:

    Peninsula sumps are the way of the future!

    so much space for storage!


    I currently have about 120lbs of live rock in my 90gl, and will be adding another 60-80lbs of live rock which is in a 20gl tank curing, already packed full of pods. Not sure I could add another lb of rock in there!


    Planning on going bare bottom for this build.

    Found a place in the living room for the tank. bye bye nice floors!

    Walls were taped to mark the tank stand height, tank top, and light height, all so I could get an idea of how the tank will look before I moved 370lbs of glass in place. The floors will likely be drilled closer to the front of the stands so I can keep most of the factory plumbing that comes with the tank up towards the front of the stand, along with the gate valve for easier adjustments.



    Stand is built! Lots of parts


    Doors to come once the electrician is done and the tank is on the stand. Still need to level it.


    Build specs:
    Tank: Red Sea reefer xxl 750
    Corals: planning a mixed SPS / LPS reef
    Lighting: 4 radion XR30 g4 pro's w/ their mounts. The reason I went with these vs multiples of the XR15s is that I already had 2, and picked up 2 more slightly used off the boards.
    Flow: 2 MP40's on one end, 1 Gyre 250 on the other. Also using vivid's dual random flow generator for the return nozzles.
    Main return pump: Abyzz A200
    Sump: Using the 40gl that comes with the red sea tank. It will be in the basement, and more plumbing pic's to come once I get the tank up and running!
    Theiling compact roller matt.
    Life Reef Ca reactor will transfer from my current tank
    Life Reef Media reactors will transfer from my current tank
    Life Reef Skimmer will transfer from my current tank along with the c02 scrubber
    Currently have a 20gl frag tank connected to my 90. If I can fit it on the stand, this will move next to the basement sump.
    Currently have a 10gl refugium connected to my 90's sump. Planning on bringing this over to the new tanks sump, however not 100% sure yet as the new sump has a ton of room as is.
    For control, I currently have a full apex setup on my 90 and will be transferring everything over. Eventually I would like to automate water changes.

    Items I need to finalize
    Basement ceiling / floor support. joists are 2x12's and will be parallel with the tank, so I still need someone out at the house to look and confirm for me I'll be good without additional support. Forum posts have gotten me some good info, appears they are good but I'd rather be 100% certain.
    Plumbing: red sea parts are metric, sump is in the basement. Also, Abyzz pump outlet is 1.5", and will need to go up and downsize to a .75" connector.
    Basement sump: will need to verify its enough and won't overflow
    Drilling through wood floors: More to come on this. Already warned the wife, with promises this is for a near silent tank. With that said, hearing others red sea tanks with the sump in the cabinet tells me they are already pretty silent.
    Electrician: Have one coming this thursday to return the living room outlet, adding some in the basement, and putting on their own dedicated circuit
    Tank move plan: Best way to transfer, still need to determine. I think I'll get the new tank up and running, transfer over the inhabitants, bring over the skimmer, Ca Reactor, doser, apex, start testing more frequently until I get the #'s dialed in and go from there.
    I already have a RODI station in the basement setup a year ago. I plan to get bigger water tanks for this, add a pump and a line from the basement to the tank upstairs for easier water changes.

    Thats it for now! Lots more to come in the next few months! Thanks for looking!

    -Eric

  2. Likes icedearth15324, Mjl714, Fish_wiz2, SPS007 liked this post
  3. #2
    Premium member icedearth15324's Avatar
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    This is literally my dream build right here. Can't wait to see how it progresses.

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  5. #3
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    Same for me! I went back and forth on tank sizes, debated going larger, in the end went with this one due to availability, product info from the manufacturer, as well as all the info around others builds across the different forums. This has all helped significantly with planning but there has still been a lot of in answered questions for me. The plumbing for example, is great if you want an out of the box solution, but isn’t as cut and dry if you want to relocate the sump. For the price though, I couldn’t beat the sale they had this past Black Friday. I did get the tank through BRS, and was able to basically buy the tank with prepaid $90 for $100 gift cards, which saved me even more. Any dollars you can save in this hobby and put elsewhere go a long way.

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  7. #4
    Senior Member Mjl714's Avatar
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    Looks like an awesome build.

  8. #5
    Senior Member Fish_wiz2's Avatar
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    Build is already off to an amazing start! My buddy just got the exact same tank too, we just voided the warranty by drilling two holes in the back of the stand to get to the fish room behind the tank. Good idea taking the bottom panel out. Not a huge fan of the stand myself but the finish is pretty.

    Pro tip, order metric to standard fittings now. Red Sea's proprietary fittings SUCK and without these converters, good luck trying to get a standard PVC attached to it without fencos.
    Up to something....

    Koi Pond.

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  10. #6
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    wish i waited little longer.... xl 425 here. great company! what sump does it have?

  11. #7
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    Got all the fittings from brs on order. The return line converts to 3/4, the overflows to 1".

    Sump is basically a rimless glass 40 gallon tank, U shape flow pattern. The 5gl ATO sits on top, gravity fed. Under the stand you just slide it around to access different sections, however it is kind of useless for the size of tank that it is. My 90 evaps about 7-10 gallons a week so I can only imagine what this one will.

  12. #8
    Senior Member Mjl714's Avatar
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    Agree on the sump, depending on the time of the year, my 75’s evaporate 10gal’s in 6-8 days.

  13. #9
    Senior Member ultimatemj's Avatar
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    Quote Originally Posted by Mjl714 View Post
    Agree on the sump, depending on the time of the year, my 75ís evaporate 10galís in 6-8 days.
    This was something that drove me nuts, in particular when I had the sump under the stand and would travel for work.

    Once, after coming back from a 2wk trip, I came home to a return pump sucking air, the APEX temp sensor measuring ambient temp, and the heaters ON because the temp wasn't changing! Nearly cooked everything. For a while I would get someone to refill the container while I was gone...got old real quick.

    Now, I too have a basement fishroom beneath the display in the family room above, and found a solution that has made this a twice a year maintenance (when I do RODI maintenance).

    The Avast Barrel Tender, it refills the ATO container directly from RODI. The key here being that you don't want an RODI to turn on and off a lot, so you don't want to hook your ATO up to it. The Barrel Tender is purely to keep the ATO container full. When it is close to empty, it runs until refilled, and then is off for how ever many days that supply last. I think mine is running for ~10min every 4 days.

    Here's a crude diagram
    Plumbing.jpg

    Not in the diagram is the APEX, which has various fail safes programmed. And the SmartATO that was used as a redundancy/failsafe and is not online anymore. I had there because the ATO is pushing through the Kalk reactor and the PH spike can spike...so I have the APEX is setup to turn off the primary ATO for 30min when PH is above 8.4. So the Smart ATO would only come on if the PH stayed high (keeping the primary ATO off) and evaporation dropped the water level near the sensor and pump level.

    Having the sump in the basement has been so much more reliable than when I had it under the stand.

    Have fun with your new build!

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  15. #10
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    Thanks for the info!

    On a side note, just discovered farm and fleet sells those 65gallon water storage tanks, $130 or so each. Picked up 2 so I can upgrade from my 2, 30 gallon storage containers. Believe they have a deal where you get a $10 gift card through this weekend for every $100 spent.

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