I guess Ill keep this thread updated with my findings so there is some record on the internet for the future.
I noticed the striped scats in the pet store last year (Oct 2020) when I went in after a while of not visiting. The LFS said they were slow movers and had been for there a some time already. I wanted them, but didn't have the right sized tank (as I know about their potential size).
I have been there a few times since, and eventually decided to get them in April/May this year (2021), and they were approx 4cm in size .
I know LFS don't typically feed fish often, and the smaller holding tanks are not conducive to growth, so there was pretty much no change in their size in 6 - 7 months.
Since being in my tank (3 months ish now), there hasnt been a huge change. they have filled out and look thicker (obviously because I feed them more), and the largest one has put on a little less than 1 cm in three months. The others are about half that.
The spotted scat was from a different LFS, I got 2 of them, but they were really emancipated and didnt look very strong (it was more of a pity/recuse buy). The one spotted scat died the same day he was added, the second fella filled out really well and is now the boss of the whole tank. He is about 5.5cm now.
Both the spotted and striped scats were in full freshwater in both the LFS, and I moved them immediately to full marine.
They either have slower growth rates than I expected, or there was some stunting done in the LFS and they will have a bit of a growth spurt at some point.
Online info says they can reach about 35cm, but its more common and likely they will reach 20 cm ish.
