Hey all, been a lurker here for a long time, and seeing as how I am actually beginning a new journey, thought I would kick it off with a thread about my plans and to see how it goes. I went with a 300G from Glasscages. In my kneck of the woods, craigslist and facebook very rarley have any larger tanks. I ordered it back in mid-November 2020 and it is scheduled to arrive Monday January, 25th . I am super stoked, I think I have everything I will need for the setup. I got the basic tank and stand from gc and plan on drilling 7 holes when it comes in for overflows, returns and a drain line. I plan on going for all standard PVC for water flow with plenty of union's so if I need to do any maintenance I am covered. I ended up going with a Custom Aquariums H2Overflow rated for 2400Gph for the drain lines and (4) 3/4" syphon stopper returns. I plan on doing a 1" evacuation line that I will attach a jebaow pump for water changes. Since the setup will be right next to an outside wall, and I don't have any nearby drains, I plan on just popping a 1" hole through to the outside and draining into the garden. Hopefully this won't freeze up during the winter. 
For the H2Overflow, I plan on going with a bean animal setup with (3) 1 1/2" drain lines. All of which will drain down into a 75G aqueon, I picked up at petco's discount tank sale. I plan on drilling the 75G tank with a 1 inch drain as well so that if the sump is ever close to overflowing, it will drain outside. I plan on attaching both the drain lines and putting a ball valve on both lines before the T on either side so that it will only drain into the garden and not back up into the sump. For the sump design, I plan on going baffleless, and wil be adding a jaxracks (ebay) dual 7" filter sock holder to help with mechanical filtration and going with a boatload of ceramic rings and a few 2" sponge sheets I picked up on amazon. For the heaters, I choose 2 of the BRS 300W's and I am using a Ranco thermastat I wired up. I also ended up using some 3/8" heatshrink tubing on the ranco probe, to protect it from sitting in the water. For the return pumps I went with 2 of the jebaow 8000's. I plan on feeding them each 2 syhpon stopper returns, so will see how that goes. The tank sits right next to my cold water line for my ice maker, so I have considered doing a drip, but think I may wait on that until I am further along in the project. I think I have all my bases covered on this, and will update with pictures as I get the build moving forward. Please let me know if anyone has any questions, criticism, or comments on my plans. Thanks!
For the H2Overflow, I plan on going with a bean animal setup with (3) 1 1/2" drain lines. All of which will drain down into a 75G aqueon, I picked up at petco's discount tank sale. I plan on drilling the 75G tank with a 1 inch drain as well so that if the sump is ever close to overflowing, it will drain outside. I plan on attaching both the drain lines and putting a ball valve on both lines before the T on either side so that it will only drain into the garden and not back up into the sump. For the sump design, I plan on going baffleless, and wil be adding a jaxracks (ebay) dual 7" filter sock holder to help with mechanical filtration and going with a boatload of ceramic rings and a few 2" sponge sheets I picked up on amazon. For the heaters, I choose 2 of the BRS 300W's and I am using a Ranco thermastat I wired up. I also ended up using some 3/8" heatshrink tubing on the ranco probe, to protect it from sitting in the water. For the return pumps I went with 2 of the jebaow 8000's. I plan on feeding them each 2 syhpon stopper returns, so will see how that goes. The tank sits right next to my cold water line for my ice maker, so I have considered doing a drip, but think I may wait on that until I am further along in the project. I think I have all my bases covered on this, and will update with pictures as I get the build moving forward. Please let me know if anyone has any questions, criticism, or comments on my plans. Thanks!
It seems like it would be safer, just in case the probe on the new Ranco I got isn't as good of quality as the one i am currently using.