Re: [APD] sand choices

["Richard J. Sexton" <richard at aquaria_net>]

>>>The "play sand" I've seen has very fine granules and may not be a sound sand
>>>choice:-) Being fine, it will compact, become
>>>anaerobic, which is bad. I used this over a soil underlayment and it quickly
>>>became a nightmare to the eyes.....and olfactories:-)
>>>TIA, YMMV,
>>
>>I've used it for decades. Works fine. It contains metal particles though
>>which you could remove with a magnet. I don't bother. Recall Horst
>>and Kippers water analysis of crypt water. 1.5ppm of both ferric
>>and ferrous iron.
>>  
>>
>I take it does not vacuum well?

Seems to be fine.



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