Crypt with Yellow leaves then leaf melts away

Hey guys quick question here, I bought crypt sparalis about two months ago it was doing great it didn't melt on me but recently I have seen Some problems. The tank is a 29 gallon I dose seachems line of liquid Ferts, and have pressurized co2. Finnex planted + on for 8 hrs a day, co2 on one hour before lights and one hour off before lights off.

Ammonia 0
nitrites 0
nitrates 10-20
ph 6.6-6.8
kh NOW 3 ( I bought a kh booster yesterday) was KH 1
GH 5

Aqua Soil Substrate

also bought a bottle of phosphorus yesterday (that was the only thing I wasn't dosing)

anyways I'm wonder why the crypt is doing this, the stems on the lower part of the plant is turning a pale yellow then leaf by leaf one would melt away. It looks like all stems are doing this but most of the taller leaves are still green and lush. Is this a deficiency ? What can I do to stop this?

Any more info needed I can provide.
Thanks Jess

 

I'm not sure what the cause is but I know it isn't phosphorus. Phosphorus deficiencies cause darkened leaves.

 

What are you dosing with and is it the older or newer leaves dying off? I'd guess it's likely iron and/or nitrogen deficiency. Usually iron shows up as the newer growth is yellow, nitrogen shows up as the plant diverts resources from the existing growth to support new growth but can also cause an entire plant to rot away.

 

Hmm I do dose iron and nitrogen. Maybe not enough? I use seachems line of liquid Ferts. Maybe I should up my ML. It looks to me like the bottom/older leaves are doing this. Where as the top leaves are still green and lush




heres a photo, I don't know if you can tell but the stems coming from the substrate are also pale? What could be causing this. I hope the whole plant doesn't die. You can also see the melting stem. I see one melt almost every two days!

 

from my understanding crypts require iron-rich ferts, are you doing any iron specific dosing like flourish iron?
I bought an iron test kit and found that even after dosing iron as recommended on the bottle, the levels do not move much.

I also found a fert dosing schedule in another thread that recommends flourish iron dosed every day.
I'd suggest buying an iron test kit, nutrafin or API if they have one. I believe the levels recommended in my test kit are .10 mg/litre for normal planted tanks and .25 mg/litre for iron needy plants.

 

I have all their products I'm currently dosing 3Ml after lights been on for an hour. Should I be dosing more? Leaves turning yellow and melting is and iron d?

 

can you clarify, is it 3mL of Flourish Iron specifically that you are dosing?

 

3ml of iron? Seems a little high for your tank size but like Dude said, depends on how the plants are responding and what they are requiring. I'd trim the deficient leaves and bump up the nitrogen. Are you dosing aquavitro or their standard line?

 

can you clarify, is it 3mL of Flourish Iron specifically that you are dosing?

Yea I have a 30gallon. And dose 3ml iron a day. With pressurized co2 and good lightening? To much? To little?

 

3ml of iron? Seems a little high for your tank size but like Dude said, depends on how the plants are responding and what they are requiring. I'd trim the deficient leaves and bump up the nitrogen. Are you dosing aquavitro or their standard line?

I currently have the older line, but as bottle finish I'm upgraded to the aquavitro line. I currently dose 2ml twice a week nitrogen is this to little? Have you used this line before?

 

I use aquavitro and flourish excel (because I don't inject co2)

On the old line you're right about where the directions are but I always cut mine in half and work it up slowly watching the plants. With your nitrates at 10-20 seems low for a planted tank, I keep mine 20 pretty steadily. You might try 2ml three times a week for a couple weeks and see how that does checking levels every other day. Your nitrates may read a bit high with the dosing but are not harmful to the fish although they still read high.

 

Ok I'll add one more nitrogen dose a week. I had to clarify what my nitrate were and your correct I actually have 20-40 ppm more so on the 20side.