Took up striper fishing last year and have always done a lot of crappie fishing. Tried making a bait tank from a 55 gallon drum like everyone else. It works good for shiners and so-so for shad. I can keep shiners alive forever it seems, but still not the best solution for shad. Been debating about getting a nice bait tank, but really hate to spend $600 on one. I probably would go with at least 40 gallons. Has anyone tried taking the cheaper molded bait tanks like the moeller tanks and adding filtration and recirc pump to them. I saw online where a few companys do that. If anyone has tried let me know how it worked out. How important is the insulation that I know it is missing? Thanks for any info guys. Also if anyone has a nice bait tank in the 35 to 50 gallon range that they would sell, shoot me a pm.