https://www.amazon.com/Mesh-Bottom-Trays-Wheatgrass-Hydroponic/dp/B071CFPSSG/
I did have a few chipped corners on some of the trays, maybe due to handling during shipping, or brittleness from shipping in freezing temperatures. It doesn't affect the functionality though, so I kept them and they work great. You can also get solid trays that nest with these from the same seller.
On the first test I used this one from Amazon:
"Trixie Sphagnum Moss tropical Brick, 100g"
https://www.amazon.it/gp/product/B002YJW382/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1
the cheapest I could find = 7€
This is the microscope I recommend. If you go cheaper than that, you will be buying garbage. There are better microscopes, but they will cost 10x as much as that scope.
They've only been inside since mid January, so it's not been in for that long.. :/ I assumed the creation of sporophytes would take a week or two, this species is growing very quickly.
All of January I flooded the entire culture, as it had some gnat larvae I wanted to kill. Since then it's always been between 1cm below the capitula to 4-5cm below max. No closed container, am using a see through plastic box without a lid. Grown under grow light, it's difficult to know the PAR as I do not have a meter and their not growing directly under the light. This is the light I'm using. There's a tiny tiny bit of natural sunlight, but it's negligible. I have my light on automatically every day from 07:30 to 22:30.
I highly recommend this small booklet, which explains the sphagnum microbiome and is an encyclopedia of the other microscopic life forms that live inside sphagnum:
Microscopic Life in Sphagnum (Naturalists' Handbooks, Vol. 20) https://www.amazon.com/dp/0855462914/ref=cm_sw_r_cp_api_glt_i_C1QFKSGFRH94N262CVSV?_encoding=UTF8&psc=1
Btw, what do you class as an "intense" grow light? The one I have is very cheap so I assume it's not the most powerful: https://www.amazon.com/gp/product/B085CDPSMR/ref=ppx\_yo\_dt\_b\_search\_asin\_title?ie=UTF8&psc=1
This is the light I use:
https://www.amazon.com/gp/product/B085CDPSMR/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1
To be perfectly honest I have no idea how much the light is helping as I haven't done an experiment to see the difference between growing with or without it but they have been growing pretty quick so I'm under the impression the light is giving them more photosynthesising time, especially as the daylight is pretty short right now where I am.
Since I started this container, I've only sprayed extra water in there a couple of times. It doesn't really dry out because I keep the lid on most of the time but as the moss grows, it incorporates some of the water into new growth and it grows higher above the water table so I try to replenish some of the water it uses and raise the water table slightly as it grows taller but the plants themselves have never showed any signs of thirst so these have been very small and occasional changes. I mostly just try to leave them alone.
The German and Japanese scopes are the best, but also the most expensive. The Korean scopes are the best you can get if you are on a budget. They are stikl real professional grade scopes. Here is what I bouguht for sphagnum research:
OMAX 40X-2000X LED Binocular Compound Lab Microscope w/ Double Layer Mechanical Stage + Blank Slides, Cover Slips, & Lens Cleaning Paper, M82ES-SC100-LP100 https://www.amazon.com/dp/B0094JTZOU/ref=cm_sw_r_cp_api_glt_fabc_32W49ECQZMSPYWFMZZ58