Photoperiod the time frame of lighting which you turning on.

Disposable CO2 can is the same the DIY CO2. Why you can't just get a CO2 cylinder? Because disposable CO2 is much more expensive the CO2 cylinder if you running it for long term.

Wow...where are you from? The temperature at daytime and night time so much different? You can try the flying fox or SAE. Remember get the young and small one. Coz the adult flying fox or SAE won't eat any algae...

Rosy barb eating hair algae? Emm....I never try those. Perhaps you can give it a try.

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