On 3/18/04 7:14 PM, "Tom Wikoff" wrote:

Last summer a young man
at the local nursery/water garden outlet advised me to take out and replace
the lava rock because of my complaint about string algae.

Is there string algae on the rock?

I had never heard of the need to replace this rock and find the thought of the
cost of replacing it just a bit hard to swallow. Was that sound advice?
Can't the rock be "cleaned" instead.

Yes, but probably no need. I have some in a water fall thing too but I've
never cleaned mine, just the mats.

Sounds like someone just has a big markup on lava rock to me.


Joe



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