A Community and Forum For Aquaponic Gardeners

What size of gravel is the best?

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Permalink Reply by TCLynx on January 4, 2011 at 4:09pm

Well I know there are many Australians that use what is called blue metal there. I've never encountered such aggregate myself. Find out if it is granite, if so it should be fine.

Ross Cayson said:

Could anyone tell me if crushed rock aggregate Called blue metal "3/4 would be a safe rock to use in my aquaponics system????

Permalink Reply by Izzy on February 15, 2011 at 8:27pm

THE BEST ANSWER IS WHATEVER WORKS BEST FOR YOU.

In general, 10-12 inches is the most commonly recommended depth, but given the conditions for your local area, your systen setup, your system conditions, and the plants you are trying to grow, this can vary OR not matter at all (given a minimum depth). General research is truly lacking in this area, unfortunately.