Hi all, after few days of extensive reading and YouYube-ing, I'm interested to dip my feet into this hobby - the picture that has given me inspiration:

I like the Iwagumi concept, and I could just watch the Youtube videos of Iwagumi tanks for hours!
So, with Iwagumi concept in mind, I'm going to start small, this is what I have in mind - just focal rock with Monte Carlo plant as carpet, stabilise the system first for few months before adding shrimps:

I've decided to get these equipments - I'm willing to spend ~RM600ish for total startup cost - let me know your thoughts:
Glass Tank:Fluval Spec 5 gallon (~20 liter) approx RM400.
Would
LOVE ADA tanks, but when considering separate external filter + lighting system, I guess I'll get this for upgrade in future when I fully grasp the whole idea.
SubstrateADA Amazonian? Do I need extra boost?
Co2 SystemOk this is what I need your help with - I'm planning to put this in my bedroom, which has a lot of big windows with UV film + thin transparent curtains.
Although I'm going to put the tank on the corner where direct sunlight does not hit - it will still get indirect sunlight as the bedroom is bright during the day.
I read that high light needs high Co2. Ok, I can put in Co2 system.
I think I'm going for pressurised Co2 tank system - as I occasionally travel for work (~4 weeks at a time) so DIY yeast/sugar is not feasible.
I found this method
here which I think is good, but requires extensive DIY. Is this what you guys are using? Especially in Malaysia, how easy to buy the Co2 cylinder? Is there any suggestions where I can get the regulators, valve, etc hardware (Kajang/KL)?
FloraMonte Carlo carpet and some dark coloured rocks - will see what I find in fish shop

I hope I'm not missing anything else - appreciate your feedback!
