Cool stuff. I did an "up sump" on the frag tank I setup awhile back. I wasn't as successful as you.
My advice, keep it going, but don't invest much money into optimizing the current setup. There's a lot of very cheap tanks+stands you will see in the club (or on resale). In my experience the diy ones are fun, and easy to get attached to because it's got your work in it, but objectively buying a nicely used, standard, setup does have a lot of benefits.
I don't agree with the "buy once" philosophy that sometimes gets brought up in the hobby, because usually it's code for "go into debt on something that doesn't really matter". I however think the philosophy of minimizing investing in minor tweaks versus saving up for big ones makes sense.