Val not growing tall - The Planted Tank Forum
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post #1 of 10 (permalink) Old 10-10-2020, 11:09 AM Thread Starter
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Val not growing tall

While my Vals are really good at getting runners (baby vals) once acclimated, they are not growing tall.
What's the secret?


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post #2 of 10 (permalink) Old 10-10-2020, 04:45 PM
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The biggest thing is, what are your water parameters?


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post #3 of 10 (permalink) Old 10-10-2020, 06:44 PM
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I'm showing in the greenhouse that vals with really low nutrient availability and direct sunlight have very low growth. My Vallisneria americana should be getting leaves about 4 ft long but they are 2" at most after 2 years of growing. Unless you have sunlight, it is probably a nutrient issue.
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post #4 of 10 (permalink) Old 10-10-2020, 10:51 PM Thread Starter
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Ph 8.2
Tds 362
Po4 1
Nh3 0.25
No2 0
No3 40 liquid api
No3 10 stick api
Kh 240
Gh 180


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post #5 of 10 (permalink) Old 10-11-2020, 06:51 PM Thread Starter
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?


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post #6 of 10 (permalink) Old 10-12-2020, 04:57 PM
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So your pH is around mine, off tap I run 8.0pH already, and I don't run any nutrients in my tank albeit I have a different vallisneria (nana), but grew probably 60 nodes in a mixture of dirt/fluval stratum/eco-complete/botanicals in a span of 4 months. I want to say your lighting may not be that great if it's not growing tall. I have the opposite in my 55 where I do grow jungle val, and they're growing super tall, but they're not wanting to propagate. I also have leopard vals that are doing super well, so I guess it all depends.


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post #7 of 10 (permalink) Old 10-15-2020, 05:06 AM
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They need extra iron, light and root tabs. I grew them in my refugium and threw out a garbage bag every 3 weeks. Super fast growers. the Jungle Val was growing 3+ft for me. Quit growing them because they hate Excel and I was having issues with staghorn algae at the time. I had lots of fish in the main tank providing nitrogen so you might need to add flourish or something on top of the root tabs. I run my tank at pH 6.6 to 7 with CO2 so might not be comparable to yours. Wiki says they grow to pH 8.5 but I think 8 is high for a planted tank. Not sure this is any help but might give you clues. I had your results before adding root tabs and Iron.
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post #8 of 10 (permalink) Old 11-02-2020, 06:06 AM
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I apologize if this seems like a dumb question, but are you sure that what you have is actually Vallisneria? Maybe you've got Helanthium tenellum (formerly known as Echinodorus tenellus), or Sagittaria subulata (dwarf sag.)?
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Last edited by davemonkey; 11-02-2020 at 06:17 AM. Reason: Additional information added.
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post #9 of 10 (permalink) Old 11-02-2020, 09:16 AM
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Do you have a picture?


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post #10 of 10 (permalink) Old 11-03-2020, 12:14 AM
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Which type of Vallisneria do you have? Not all grow tall.
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