I was actually looking at breeder boxes but couldnt find anything with the dimensions I wanted. I'm looking to build something close to 5x2x24. I'm flexible with the dimensions as long as I can preserve the aspect ratios of the planter. Also I have something similar to the link you sent me, I have had not that great luck with those. They keep falling down with the level of water changing and even runs the risk of becoming dry if the level of water falls by a few inches. The packs do not ensure water circulation and leads to dead spots around the planters. Considering they are laser cut acrylic, the price is justified, but with 60$ (4packs) I can create the whole thing including the pump. I'll be doing a more thorough search for breeder box or refugiums.
Thank you for your help