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Re: Black and curly leaves of Hygrophila polysperma

Sorry for the broken link. Here is another one:

In response to Paul Krombholz question if I have 24 hour lighting - No I
have not. It's currently on 13 hours/day and adjusted to go out when my
Rotala spec. "Nanjenshan" (Mayaca sellowiana), Rotala wallichii and
Eusteralis stellata closes their leaves.
1) This is perhaps too many hours/day?

2) My guess was Ca-deficiency, but as long as I have measureable KH/GH I
guess there can be no Ca-deficiency?

----- Original Message -----
From: "Daniel Larsson" <defdac at hotmail_com>
To: <Aquatic-Plants at actwin_com>
Sent: Tuesday, April 23, 2002 10:50 AM
Subject: Black and curly leaves of Hygrophila polysperma

> Whats up with my polysperma? New leaves are small, stubby, twisted, curly
> and black:
> http://defdac.tripod.com/sitebuildercontent/sitebuilderpictures/h_poly.jpg
> Tank specs:
> 300 litres, 1-5 ppm nitrate, 1-3 KH, 6 GH, 0-1 ppm PO4
> 4x36 watt grolux
> 1,5 bubble/sec CO2
> Every week after 25% waterchange I add:
> 1 tablespoon of K2SO4
> 1 tablespoon of MgSO4
> 1 teaspoon KNO3
> 30 ml Tropica Master Grow
> In the substrate I use "Pokon-sticks" for additional N,P,K (12-6-8):
> http://www.pokonchrysalusa.com/prods/151-177.htm