Planted Tank Guru
Join Date: Jan 2010
Location: Contra Costa CA
If the dosing and water changes work for you, fine.
Discus prefer slow moving water. Clown Loaches are river fish, thrive in much faster moving water. Set up filter and power heads to provide areas with fast moving water, and areas with slow moving water.
Neon Tetras are cool water fish, not so good with Discus and Clown Loaches, both of which thrive in warmer water. Suggest a much larger school, but just one species. Instead of 10 Neons, + 5 Rummy Nose, just get 15 Rummy Nose. Then hope they do not get eaten. They are small enough to get eaten.
Rams are pair bonding. Monitor however many you get and be ready to remove fish that are getting chased or attacked. A 75 gallon tank is large enough that 2 pair might work out who gets which part, especially if it is densely planted. You might start with 2 known pairs, or 5 younger fish and let them figure it out.