> From: krandall at world_std.com (Karen A Randall)
> Date: Wed, 21 Aug 1996 10:46:05 -0400
> Subject: Anubias Rotting
> PROBLEMS: <snip> ... Anubias rhizomes are rotting. etc..
> ASIDE: <snip>... most of my duckweed has disappeared ....
> Bells went off when you mentioned the Duckweed disappearing. Have
> you measured your nitrate level? I find that in my tanks if all
> the Duckweed and/or Salvinia goes away, that my tank has become
> nitrogen starved. Is it possible that this is what's happening in
> your tank?
That's exactly what I thought also. Normally I have a thick carpet of Duckweed
which I have to harvest at every weekly water change. When it started thinning I
thought I must really be getting on top of nitrates, however test results showed
little change (I can't remember the figures but I'll be doing a test tonight). I
also replaced the tritons in case that was the factor. I have a fairly heavy
fish load for a plant tank so nitrates are usually higher than I would like.
>> In my experience, only A. b. nana really does well submerged.
>> A.congensis is one of the least adaptable. Even A.b barteri
>> only to do well for a few months.
> I grow A. b. var.. nana, A. b. var.. barteri, A.b. var..
> angustifolia, A. b. var.. caladiifolia, A. 'Coffeefolia, A.
> gracilis, A. afzelli and A. heterophylla (syn. A. congensis)
> permanently submerged in my tanks. I have had all specimens
> except for A. gracilis for 5+ years. Not only do they grow well,
> but all the A. barteri varieties bloom regularly, and the A.
> heterophylla has bloomed twice in that period.....
Could you possibly list your conditions for healthy Anubias. I used to think my
water was Anubias-Friendly until this rot set in but I would consider tinkering
to improve conditions. At the moment I see this as an inconvenience and not a
fatal state, so I am carrying on as normal except for more trimming and I'll see
what develops. Thanks for your help.