lazy... or is there really a need, to do it weekly... water change schedule...

They are both Inert. BDBS is just coal slag. It's probably mined 20 miles.from me.
I have not yet heard one instance of BDBS not being fish safe.
a) frequently it is not pure coal slag
b) get an accurate tds pen and measure the water - put the bds in it - wait a week and measure it again - you might be surprise.

anyway do what you wish after all it is your aquarium not mine.
 
a) frequently it is not pure coal slag
b) get an accurate tds pen and measure the water - put the bds in it - wait a week and measure it again - you might be surprise.

anyway do what you wish after all it is your aquarium not mine.
Have you used it and had issues? Really the only issue I've seen is dust if not rinsed well. Many people swear by it.
I could do PFS, but I dont like how sand looks. Look at every biotope tank ever, it's always sand.
 

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