Simply clean the subsoil~ only to find that the subsoil is too dirty 

#Black soil
#Turn over
#Aquarium
If the bottom soil of the aquarium is not cleaned for too long, a large amount of material will accumulate, and the soil and the soil will harden. The aquatic plants are less breathable.
You can clean up by turning over the tank to achieve rapid growth of water plants
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Use tds to test water quality: • #水草新手篇11~當你不知道哪時候該換水 可...
Experimental perfect concentration to remove black hair algae: • #水草藻類篇5~酒伯教你如何調配檸檬酸 來對...
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Something may happen if water plants cannot absorb nutrients: • #水草肥料篇8~不管怎麼補充養分 對水草卻無...
The water plants turn white overnight. Why: www.youtube.co....
Novices are advised not to raise aquatic plants in summer: www.youtube.co....