Fast growth, pale colour, what going on?

[Flyinghellfish]

Alright experts, signed up here thinking you guys can help me out.

So the water sprite and Hygrophila corymbosa 'Siamensis' I have are both know as fast growers but their colour are not the ideal green.

Hygrophila corymbosa 'Siamensis' : Fast growth, lower leafs remain a good colour green. Top leafs continue to grow yet are yellow/pale with some leafs having dark green veins.

Lack of Manganese or Iron?

Water Sprite (Ceratopteris thalictroides) : Fast growth, new stems spring up from the bottom. The stems are strong and busy with a pale colouring, in about 2 weeks no matter what, they turn into a darken brown colour and new shoots with roots appear. How do I stop the brown rust?

Cryptocoryne spiralis : Slow growth, good colour but has a form of crypt melt. It's been moved so I was expecting this, it's also recovering with new leafs. The brown is the "spider-web" type of algae formed at the base.

Stats:
12 gallon Low to Medium light
Seachem | Excel, Iron daily with Flourish 2x a week. Recommended levels.
Flourite Red substrate.
Nitrate = 5ppm to 10 ppm

4 Harlequin Rasbora, 6 White Fin Tetras, 10 Cherry, 1 Amano.

Pic: None of the originals water sprite stems are left, I have prune them all. All new growth for the water sprite.

This is when it was first started: I have prune the corymbosa as it reached the pass the filter intake. This old pic shows how short it was when I got it. I didn't get a chance to take a new pic of the height but it was very tall with new leafs growing, the colour was also pale.

 

[pepetj]

Exactly what are the specs of your lamps? It comes to mind that maybe the color temperature is playing you a trick...

Regarding the "brown" I have no idea.

Pepetj
Santo Domingo

 

[Tom Barr]

Looks like Mg, not Mn.

Are you adding any MgSO4?

 

[Flyinghellfish]

No, but I can add some MgSO4. Can I just use Epsom Salt for it? If so, how much should I add in for a 12 gallon?

Does anyone know what the dusty spider web material is? It is usually captured by my water sprite along with being a real problem on the bottom of my Cryptocoryne spiralis.

I forgot to mention that I am using Seachem Purgien, not that I think it makes a difference. Nitrate level has never gone pass 5 - 10 ppm, I been told this could be a problem.
I have been also told to dose less and have the plant accumulate to the low Co2 and Nutrients.

Flourish x2 per week
Iron daily
Excel daily

10 - 15 % water change twice a week: Total 20 - 30 % a week.

 

[charlie]

No, but I can add some MgSO4. Can I just use Epsom Salt for it? If so, how much should I add in for a 12 gallon?

Does anyone know what the dusty spider web material is? It is usually captured by my water sprite along with being a real problem on the bottom of my Cryptocoryne spiralis.

I forgot to mention that I am using Seachem Purgien, not that I think it makes a difference. Nitrate level has never gone pass 5 - 10 ppm, I been told this could be a problem.
I have been also told to dose less and have the plant accumulate to the low Co2 and Nutrients. Flourish x2 per week
Iron daily
Excel daily

10 - 15 % water change twice a week: Total 20 - 30 % a week.

Is that what you were told
I know i toldyou this , in response to what you told me

Off the top of my head with no intimate knowledge( is that the right word LOL) of your tank, i would think from the info you provided you need to start doing a better fertilization approach which includes Macro ferts - Nitrate- Phosphates -Potassium
I would suggest using seachem line since it`s only a 12 gallon & follow their dosing chart which can be found on their site, you can also do the dry ferts with Estimative index But use 1/2 of what the dosing guide says for the 10-20 tanks, can always increase as time go by, but i think that should suffice.
Hope that helps.
BTW which ever you choose start with 2 x a week for a few weeks, so the plants have time to adjust & start up taking @ it`s full potential

 

[Tom Barr]

I think Charlie has a better idea of the issue and the background there.

Good advice, take that 1st, then if you still have issues after a few weeks, then ask again. etc.

 

[scottward]

I think 1 teaspoon of Epson Salts dosed after a water change will do the trick, assuming you do a 50% change weekly.

 

[Flyinghellfish]

The Epsom Salt did the trick, carry on fellas.