I've been watching your build on YouTube for weeks. It's a pity I don't understand Indonesian and no English subtitles. I self built a 100T tank too so I could see some of the issues you would be facing early but I guess each country has it's own way of doing things. I'm interested in how you will roof or keep the sunlight out.
Your bottom drains would suit air lifts to move 10 ~ 15,000 LPH well. Pumps would pulverise particulates too much.
Why do you have such big borders below and beside the viewing panel? Why not go deeper & wider? I'm glad you demolished the 8m tank. It had some terrible design flaws.
There are lots of wonderful big tanks being built in Indonesia, Thailand, Europe, etc could you recommend a better fish forum for big tanks?