Is it normal for red mangrove?

[itelshot]

Hi, at the end of summer I bought red mangroves, they grow under 100 watt light at a height of 30 centimeters in old sand from the sea in brackish water. 1. On them in the last 1,5 months the leaves have started to yellow a little, and in places where the yellowness is the longest - more obvious and darker dots.

Or is this normal and they are just growing and preparing to drop the old leaves?

2. I noticed that the leaves are sharper on the middle mangrove than the mangrove on the edge, are they definitely all red?

 

[itelshot]

Bump

 

[Subsea]

@atelshot
They look sickly. I perused some of your threads and on one thread, you observed urchin eating mangrove roots. Are these the same plants?

I know little of mangroves. In my seaweed experience and as a homeowner with turf lawn, when I see that color of green, I usually dose iron.

 

[itelshot]

@atelshot
They look sickly. I perused some of your threads and on one thread, you observed urchin eating mangrove roots. Are these the same plants?

I know little of mangroves. In my seaweed experience and as a homeowner with turf lawn, when I see that color of green, I usually dose iron.

Yes, these are the ones that were bitten by the sea urchin. I think that the problem is not in the roots, because I taped them with cyanoacrylate. They also rooted well and gave new white roots in large quantities, which I have not seen before, two weeks after planting them in sand. Also I do not know how bad (although in the usual environment they grow in the swamp) that the sand is stale and blackened and with gas bubbles inside, although I sometimes change the water and there is aeration for circulation and oxygen in the water.

So I think there may be the following reasons:

1. Infection is unlikely

2. I will try to figure out how to hang the light higher, maybe it is overexposed

3. Maybe it's normal and it's growing taller and will drop old leaves.

4. Some kind of virus?

5. Maybe I really should look for fertilizers for freshwater plants, although the sand already consists of small shells and sand + brackish water with aquarium marine salt. So I was hoping that for the first time maybe minerals would be enough.

 

[lbacha]

That looks like a nutrient deficiency, while mangroves will constantly drop dead leaves the rest should all look a nice uniform green. You may want to check your nutrient levels N,P & K and if they look fine then it is probably trace elements like iron or magnesium. Mangroves will such up alot of nutrients once they are happy so you need to keep an eye on that.

 

[itelshot]

N,P & K it's Nitrogen, Phosforous and Potassium?

That looks like a nutrient deficiency, while mangroves will constantly drop dead leaves the rest should all look a nice uniform green. You may want to check your nutrient levels N,P & K and if they look fine then it is probably trace elements like iron or magnesium. Mangroves will such up alot of nutrients once they are happy so you need to keep an eye on that.

 

[itelshot]

That looks like a nutrient deficiency, while mangroves will constantly drop dead leaves the rest should all look a nice uniform green. You may want to check your nutrient levels N,P & K and if they look fine then it is probably trace elements like iron or magnesium. Mangroves will such up alot of nutrients once they are happy so you need to keep an eye on that.

Do you mean to test the elements in water and dosage them into the water? Will they get into the soil? Is it possible to overdose and will it make things worse or not?

 

[CHSUB]

New leaves that are yellowish is fine, old leaves that are yellowing is bad. Root rot can happen to mangroves, although it takes some time. WC or flow is important and trace elements are needed imo.

 

[itelshot]

New leaves that are yellowish is fine, old leaves that are yellowing is bad. Root rot can happen to mangroves, although it takes some time. WC or flow is important and trace elements are needed imo.

Don't think it's root rot, but i can kinda dig them out for photo, if u want, but, again as i said, i noticed significant new roots growth and overall growth, so i think rot chances are low...

 

[CHSUB]

Don't think it's root rot, but i can kinda dig them out for photo, if u want, but, again as i said, i noticed significant new roots growth and overall growth, so i think rot chances are low...

If you’re moving the water some, yes probably not root rot. You can poke holes in dirt occasionally to allow gas to escape. I use root tabs to get nutrients to the roots also.

 

[itelshot]

If you're moving the water some, yes probably not root rot. You can poke holes in dirt occasionally to allow gas to escape. I use root tabs to get nutrients to the roots also.

What kind of root tabs do you use? To at least know what to look for or to buy the same ones

 

[CHSUB]

What kind of root tabs do you use? To at least know what to look for or to buy the same ones

I have only used 2 tabs total in 8 months in 2 different reef tanks. Plan on using 1 tab every 6 months, because it has a small amount of copper, but imo not enough to hurt corals.

 

[twentyleagues]

You could go the easy route and dose cheato grow. But api root tabs would work ok too.

 

[itelshot]

I have only used 2 tabs total in 8 months in 2 different reef tanks. Plan on using 1 tab every 6 months, because it has a small amount of copper, but imo not enough to hurt corals.

seems like there is no tabs, but liquid one in my country are avaliable now. Now they are growing out of tank and seems like i could use it too, but not sure about it in reef tank.

 

[itelshot]

seems like there is no tabs, but liquid one in my country are avaliable now. Now they are growing out of tank and seems like i could use it too, but not sure about it in reef tank.

Or maybe it will be easier to order tabs by reshiping from ebay... They surely wont hurt to marine tanks? Always thought it's harmful to use freshwater fertilizzers in reef.
OR firstly buy liquid for the time they grow in container before reef planting (if it is the same as tabs), but in what dossage and how often?

 

[CHSUB]

Or maybe it will be easier to order tabs by reshiping from ebay... They surely wont hurt to marine tanks? Always thought it's harmful to use freshwater fertilizzers in reef.
OR firstly buy liquid for the time they grow in container before reef planting (if it is the same as tabs), but in what dossage and how often?

I used Flourish in my reef tank about 12 years ago, but to raise po4. I’m not sure if mangroves would be able to utilize it, but think yes. I have some mangrove suspended above the gravel on rock and they grow but many times slower than planted, so they must use nutrients in the water column.

 

[00W]

Looks like a deficiency of some kind, guessing magnesium.
Here's mine.

These were just shoots 6 months or so ago.
I've never had yellow leaves or spotting.
I also spray the leaves EVERY day.
I run a pretty normal reef, water changes, etc, don't dose much but I do add magnesium once a week just for them.
Just a thought. :smiling-face:

 

[itelshot]

@CHSUB Found from a local manufacturer not expensive tablets with the composition:
Calcium (Ca) 32.0 g/kg Zalizo (Fe) 8.2 g/kg Potassium (K) 0.3 g/kg Nitrogen (N) 16.0 g/kg Phosphorus (P) 0.33 g/kg Magnesium (Mg) 1.0 g/kg Sodium (Na) 0.2 g/kg Manganese (Mn) 0.07 g/kg Zinc (Zn) 0.05 g/kg
And buried it in the ground.
We'll see what happens next. Also raised the LED matrixes and made a diffuser in case it is overlighting.
I may will post if any results in... a month maybe? I think that time is enough to take some effect.

 

[itelshot]

Also took some photos while cleaning up those. Roots looks fine and white even on the most undeveloped sapling. Another two developed even more long and web-like white roots, so it is even more not rot

 

[CHSUB]

Also took some photos while cleaning up those. Roots looks fine and white even on the most undeveloped sapling. Another two developed even more long and web-like white roots, so it is even more not rot

Roots look great!