Looking good Lazy! Make sure you watch how your Alk and calcium look after water changes. If you are doing weekly water changes you may still be evening things out weekly just from that. And a few things to consider with the potential of needing to dose. I personally love kalkwasser in the ato. It’s very easy to use and helps with ph and supplementing some other trace elements. With you not having a canopy, you’re evaporation rate should be high enough to keep a fair amount of sps with kalk alone. That could help keep things super simple and save money with not having to invest in more pumps and maintaining those pumps and buying more additives. That being said, I run two part with kalk because I have a low evaporation rate, and the two part works great too.
Also your icecap looks like it’s doing the trick! I would bet you will see even more growth with the added flow. Nice work man!