A lot of changes have happened in the last few months:
1) Bought new livestock : 2 X reticulated SAE at BigAls in hamilton (in a oddball/returns tank), bunch of chili Rasboras , 6 x CPDs, 5 x nerite snails
Refreshing the plants. Over time, I noticed the buffering capacity of the ADA soil has gone down. the R. wallichi suffered and the R. macranda wasn't doing too well either. I was also interested in trying out some Myrophyllium sp. and ended up picking a couple of bunches of red and green varieties from Big Als.
Re-model time
Overall, I think the plants should definitely liven up and freshen up the tank for me. I am interested to see how they make it in the tank now. Hopefully with the lower bio load, the red species of myriophyllium will keep its color?
Observations: SAE are among my fav fish. I have been searching high and low for the true SAE... sub sp. langei with a particularly broad lateral line that is also thick along the tail. However, I have been unable to track any down. When I found the reticulated SAE, I jumped on it. The Big Als storekeeper was against me purchasing these as algae eaters, but I knew right away that these are C. reticulatus and according to some, better than SAE.
As time passed, the fish put on some size. I lost a couple of my Otos as they actually jumped out the tank through the gaps in the lid. My nephew ran around the living room near the tank after the lights go off and I find these fish to be especially skittish. Unfortunately they paid for it with their lives.
the chili Rasboras were exceptional and very friendly. they were bold fish and did really well in this tank for me. However, after nearly 2 months since I had them and them putting on a bit of size, I lost 6/11 fish all at once due to being stuck in the skimmer. I positioned the skimmer on the opposite side of the tank after a re-model and the fish got sucked in and died

. I also lost 2 CPD as they jumped out of the tank at night.
As of now, I am left with 3 x Otos, 4 x CPDs, 5 X chilis, 2 x SAE, 8 x Scarlet Badis, 20-30 x cherry shrimp, 10 x Amano , 5 x nerite snails
The bio load is good. I don't need to worry about fish gasping for air overnight. There is sufficient O2 to sustain them until the CO2 and lights come on in the morning + the ADA lily pipes create sufficient surface agitation to help with oxygenation in the tank. I want to re-stock with a couple more Otos, a few more (5) CPDs and some chilis.. but I ran into a fin rot issue with one Scarlet Badis which died in the quarantine tank under medications. As a result, I am extremely wary of attempting to add new livestock without quarantine. So that means, I am trying to set up an auxiliary setup for new livestock to ensure that the new fish are healthy. The goal is to breed my Badis and only time will tell if I can achieve that.
Any tips/comments about the idea to add more livestock..about the current setup is appreciated.

thanks for reading.