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half life for laterite?
- To: Aquatic-Plants at actwin_com
- Subject: half life for laterite?
- From: MJPinckard <MJPinckard at lbl_gov>
- Date: Thu, 28 Aug 2003 18:32:13 -0700
- In-reply-to: <200308290009.h7T096v0028970@otter.actwin.com>
- References: <200308290009.h7T096v0028970@otter.actwin.com>
- User-agent: Mozilla/5.0 (Macintosh; U; PPC Mac OS X Mach-O; en-US; rv:1.3) Gecko/20030312
When I originally set up my tank I added laterite to the gravel mix. It
has been several years since it was originally added, and while it is
still quite visible in the mix, I was wondering if there was a period
after which the trace elements would have effectively leached out (e.g.
no longer provide iron etc.).
Since I don't have a test kit for trace elements, I thought I'd ask if
there was a rule of thumb.
I've been supplementing with 2 droppers of the Flourish liquid
fertilizer about once a week, but I added DIY CO2 last night, so I
expect that the plants needs will be going up... wanted to know the
contribution from the laterite (if any, so I can take it into account
when adding supplementals).
I'm not sure it really matters whether the laterite is still assisting,
I'm mostly curious.