But the growth wouldn't be as good compared to if you where using ferts and a form of carbon
My 38L puffer tank gets no fert or carbon and i grow java fern and have xmas moss coming out of my ears(11w of light haha)
Plastic bin 50L - $10
Heater - Got given it with a turtle tank($40)
Internal filter - Given it once again ($40)
Lighting- THE SUN!!!
So thats $10 for 50L....no joke
300L could be done for around $300-400
Do it like this
Gravel
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Sand
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Daltons
The sand holds in the daltons. Daltons will make a mess of your tank if disturbed.
It has high silica(?) as causes brown algae i think