I set up my first Walstad tank 3 months ago. And my plants are not doing so hot, but I'm not sure what's wrong. The majority of them have some problem or another though, only the Cabomba, Anubias, and Elodea are completely intact and growing well.
Here are some pictures of what's afflicting my plants.
The crypt leaves have holes and look a little damaged, though there is a ton of new growth from when I first got it, it's tripled in size.
Holes in my AR minis and regular AR. My snails are starting to hang around these too. There's been growth, but slow and I do believe they've lost some of their red color.
A little tricky to see, but that sword (I think it's a sword, I don't remember) is very sad, has no new growth and died back a lot. The tips of the leaves look rough, yellowish, and holed. Also in this picture are my vals. The original plant melted, but the runners survived, but have no vertical growth (the original plant was quite tall, so it's not a species mix up).
The leaves under the wisteria (another sword, the name escapes me) have holes, and you can see some decay at the tip of the lower leaf. I have two of these plants, and they've grown massive since the original planting. They're just now slowing down and getting holes.
This plant started doing really well after a rough patch, and now it has all those tiny holes in it, which none of the other plants have, the others are larger.
The holes are seen in the leaves of this plant as well. There has been little new growth and a lot of die back from the original planting.
And this is all that's left of my S. Repens. The older leaves got holes, rot, and eventually melted completely or fell off. And I know the problem is specific to this tank as they're making a comeback in my 5gal, low tech tank.
And there are a variety of other plants that simply do not survive in my tank. Rotala colorata isn't doing well (though I think it's settling in) blyxa japonica refuses to live, rotala bonsai is dying, along with a few others.
I'm not sure what my tank parameters are (last I checked Nitrate was at 10ppm), but temp is 79 F, I have 3 pearl gourami, 1 rupperlip pleco, a variety of snails. Like I said, this is a Walstad tank, so I dose nothing, but my water is very, very hard. Could this be a calcium or magnesium overdose?
I have a DIY LED light, 14 3watt, cool white bulbs. I haven't been able to make the second light yet, so it's just one that I swap between the sides of my 50gal tank every few days.
So... what am I doing wrong? Is this a light or nutrient problem? How do I fix it?