Took some suggestions from different forums unfortunately nothing made a noticeable positive difference, except for increasing the brightness of the grow lights a little bit. Tried repotting some in the recommended ratio 1/3 potting soil,1/3 builders sand, and 1/3 perlite (But I substituted red lava...

@ Nino_G, FredBW, keith Thank you all for the advice. I have some room for another tray, so I will take some of the seedlings and transplant them into a mix similar to what you suggested. Unfortunately I don't live near the desert so those options are out. But I have perlite and finer soil I sift ou...

@ Nino_G, That seems risky at this point. They are so small I don't want to risk damaging them. Occasionally I've had plants die shortly after repotting them.

The Japanese use Akadama because its abundant and affordable in Japan. But in the USA you will pay more since it has to be imported. If you don't mind the cost its fine but it does break down so you will need to repot every year or so. My recommendation is just find a local alternative you can get a...

I started a page recently, I sell plants/ handmade pots at the Cactus and Succulent Society of Greater Chicago show and sale, and every year I get a few people asking for my Instagram page.
https://www.instagram.com/benswordcss/

That's very interesting, I wonder what caused it. Was the humidity very high when it happened?
The only time I ever found a seed growing in its fruit was a peach. It was developing into a nice small bonsai but unfortunately it dried out one very hot day and died.

@keith, I will try increasing watering on some of them and see if it makes a difference . I'm afraid of overwatering the Psudolithos, & Whitesloanea so I will leave them as is.

@ MrXeric, Lights are on 12 hours, the trays they are in are only about 2-3 inches deep. recently I stuck my finger to the bottom of one the day after watering and it was already dry.

... it may be you need to cycle your hydration periods for longer intervals. Allowing the soil to dry out somewhat between water applications usually stimulates more robust root development, and consequently further stem development. Its usually dry within 24 hours. I was letting the Psudolithos &a...

I have grown a lot of different plants from seed but there is a challenge I encounter with many cactus and succulent seeds. At around the size of a dry pea they stop growing. Eventually some bounce back and start growing again but some never do and eventually die. (currently I have some frailea I st...