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can I use lava rocks?

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Old 01-30-2009, 01:00 AM
GregB GregB is offline
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Join Date: Jan 2009
Posts: 7
Default can I use lava rocks?

I wrote to you about two months ago and ask about the 4" pvc pipes, Well I did it! I am using clorox bottles and I have two questions 1: can I use lava rocks? will it screw up the ph? 2: I have tomatoes and peppers, hot and bell, how often and for how long should I set the timer to water using the drip system?
I have my tank below ground level to keep the temp. down as it gets quite hot during the day here in Fort Lauderdale Fl. I am using General Hydroponics FloraMicr and FlorGro. Thanks for your help and web page!
Greg B.

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Old 01-30-2009, 01:01 AM
Ron Ron is offline
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Join Date: Jan 2009
Posts: 1,285

Hi Greg You have to make sure the lava rocks have been sterilized because of the toxins that pure lava rock has. I would water every 20 minutes or so for 5 minutes and maybe more often as the plants get bigger or it gets hotter.

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