My journey into the world of mbuna cichlids

In November of 2022 I began exploywhat it would take to set up a mbuna aquarium and began by reading posts and asking questions on this site.
I have the following equipment:
75 gallon tank, stand, and glass top Pet Smart
Oase 600 thermo filter
Hugger 48’’ light
Tetra 100 air pump
50 pounds of white pool filter sand
100+ pounds of Texas Holey Rock
Digital thermometer
Fresh water test kit
I pressure test the tank with water to be sure there were no leaks. I have a tip when I emptied the tank I taped a strip a paper on the side of the take and emptied 5 gallons at a time in a bucket and marked the paper every five gallons. Now I know how many gallons I change each week.
After the tank cycled I ordered my first fish AND made a huge mistake on my first water change. I did not add Prime to handle the clorine and killed $300 dollars of fish. After recovering from my stupidity I took stock cried in my beer and correct my mistake. I check water parameters for a couple of weeks.
I purchased new fish and now have the following under my care:
6 OB Red Zerbra
6 Rusty Cichlids
6 Daktari Cichlids
6 Chailosi Pseudatropheus Elongatus
There is one male and five females for each species. They were all 1 1/2 to 2 inches when purchased but are now at least 2 1/2 to 3 inches. I must be doing something right as they have all spawned in the community tank more than once.I feed them twice one day and only once the second day.
I change 50% of the water every week along with vacuuming the bottom. I replaced the stock sponges with the super fine sponges and clean those weekly. It is easy with the Oase filter.
I owe any success I have had to the community on this site. They advised me along the way. I am not bragging and I am only posting this to maybe help those beginning to think about getting into mbunas. If anyone has any suggestions on things I may to do or I am doing wrong please let me know.
One last thing to keep any aggression down on my weekly cleaning I rearrange one side of the aquarium. The main feature is not moved.