I am trying to recreate a scene from ancient egypt. I want everything to be native to egypt and feel real. the egyptian tanks i see online are stocked with cheesy decorations, neon tetras and gouramis but none with native fish or plants.
Sounds like a cool project!
I understand these fish would be cold water and need a lot of space.
They would be tropical, not cold water. There are small fish from that area too, so you need to decide whether you want to go for the small ones or large ones.
I plan to use a 90-500 Gallon tank, but am not going to purchase until i know which fish i will use and the appropriate space needed. Another issue has been finding native plants. i plan to leave 10-12 inches at the surface for floating plants such as lotus flowers.
I recommend you go for a paludarium, so that you can grow papyrus, for example.
any help with water levels, exact temperatures, substrate, salinity, or native plants and fish would be greatly appreciated. i have no reservations for marine, brackish, or freshwater, ill take whatever info you guys have.
The first thing I thought of when I saw the title was Egyptian mouth brooding cichlids, aka
Pseudocrenilabrus multicolor, and climbing gouramis, for example
Ctenopoma petherici. I used to keep a pair of
P. multicolor: very nice fish, but on the small side and quite aggressive, so a tank with a large footprint is a must for groups. Also,
Hemichromis spp., aka jewel cichlids, could be good.
Anyway, here's the list of species: http

/fishbase.org/identification/RegionSpeciesList.php?e_code=2
From what I understand, plant-wise, it would be predominantly lilies and papyrus.
I am working based on freshwater here, I'm sure it wouldn't be that difficult to do a search for the water parameters and temperatures

For temperatures, it would be relatively accurate to look at the lowest air temperature for the area the fish are from and add 2-5 C to it, then look at the highest and subtract 3-5 C from that to get your ranges. If you want more reliable information, search for scientific papers about the species to are interested in, especially for modern papers about distributions and description.
Going by what I remember from school geography lessons, substrate is a mix of sand and fertile soil, so I would assume it's a black water environment.