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Discussion Starter · #1 ·
On my some of my ludwigia peruensis the leaves suddenly started bleeding out all color. (Small plants on right side.) This is new growth < 3 weeks. These have been growing well for 3 weeks.
The crowns that were cut off and replanted are growing fine(large plants left side). I did have a deficiency recently that led to stunting of r. Indica but after getting back on schedule everything except the little peruensis is looking good.

I dose frets, CO2, and excel.

Has anyone seen leaves do this? Any ideas as to what may be happening?
Edit: forgot the pic
 

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Off and on I dose Excel. When I stop using it...that is a common result of stopping.
I actually get a different leaf shape from some plants depending on if I use the
Excel or not.
But more detail may help. Are there small pieces you clipped off the top of plants
and were good red color when you planted them. If so the difference in height that
determines how much light they are getting could have caused that.
It could take a couple of weeks to happen. Usually when I transplant it takes about
from one to two weeks for a plant to respond to what I did. Then It will start growing
consistent with the new conditions that now exist.
 

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Discussion Starter · #3 ·
Cool that makes sense. I'm not consistent with the amount of excel I use. I'll be more careful with how I dose.

The small plants with the issue were the stem that was left after I trimmed the top. Days after trimming I got new shoots and they were growing fast and I was expecting to have more of what you see on the left. The left side plants were the tops and they have almost tripled in size since trimming.

Thanks for the reply.
 

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Hi JasterMake,

So I downloaded your picture and blew it up so I could get better detail - does any of this sound familiar?

2. Necrosis occurs at tip and margin of leaves causing a definite hook at leaf tip.


Growing point dies. Margins of young leaves are scalloped and abnormally green and, due to inhibition of cell wall formation, the leaf tips may be "gelatinous" and stuck together inhibiting leaf unfolding. Stem structure is weak and peduncle collapse or shoot topple may occur. Roots are stunted. Premature shedding of fruit and buds is common. Downward curl of leaf tips (hooking) occurs near terminal bud.
Basically the description is what I could see in your picture, minus the "leaves falling off" (aka peduncle collapse)

Tell me about your water.
 

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I would say that sums it up. I haven't noticed any gelatinous tips BUT the SAEs are taking bites out of leaves they normally leave alone. The tips might be soft enough for them to eat. Downward leaf curl is something I see. Most of the plants have it. And yes the leaves are falling off. I've pulled out over 10 in the last 2 days. All from that same small bunch.

I'll post about my water in a few mins.

My water is 100% RO mixed with 1/4 tsp GH booster per gallon.
My dry gH booster is made with 3tbls CaSO4,
1tbls MgSO4,
1tbls KSO4.
Speaking of GH booster I need to make some more.

I do 40% wc every week.
 

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Hi JasterMake,

Sorry, AFK for a while. Tom Barr's GH Booster (also aquariumfertilizer.com) is 1 part MgSO4 + 3 parts CaSO4 + 3 parts K2SO4 by weight.

Tom Barr's GH Booster Formula per Julia Adkins aquariumfertilizer.com

"Barrs GH Booster contains magnesium sulfate (1 part), calcium sulfate (3 parts) and potassium sulfate (3 parts) by weight. It is an excellent water conditioner. If there are difficulties with solubility you can add a very small amount (1 tsp to 500 ml water) of cider vinegar to increase solubility"
The DIY mix you are using is off in two areas: the amount of potassium (K2SO4) (it should be three parts not one) and by using tablespoons for making up the mix your mix is by volume and not by weight. Your resulting mix is providing a 5:1 Ca:Mg ratio. If you mixed it by weight it would give you a 9:1 Ca:Mg ratio. I know is going to sound strange, but I think you plants are suffering from a Ca deficiency - not from insufficient Ca but from too much Mg. Here is the full quote about the deficiency that I believe may apply.
2. Necrosis occurs at tip and margin of leaves causing a definite hook at leaf tip.
Calcium is essential for the growth of shoot and root tips (meristems). Growing point dies. Margins of young leaves are scalloped and abnormally green and, due to inhibition of cell wall formation, the leaf tips may be "gelatinous" and stuck together inhibiting leaf unfolding. Stem structure is weak and peduncle collapse or shoot topple may occur. Roots are stunted. Premature shedding of fruit and buds is common. Downward curl of leaf tips (hooking) occurs near terminal bud. ammonium or magnesium excess may induce a calcium deficiency in plants... calcium deficiency
It is possible that a magnesium excess is causing your Ca deficiency.

I would suggest first doing another 40% water change and them adjusting your mix so it is by weight instead of by volume and increasing your K2SO4 so it is in the proper proportion. Your dosing level should be taking your RO water from 0 dGH to about 4.0 dGH is that correct? Hope this helps!
 

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Discussion Starter · #7 ·
Sounds like a problem that I can easily correct. I was totally doing it by volume and not weight. I have run into this problem numerous times in the past without the funny color changing leaves as this is a new plant for me. It has happened at weird times and I have great growth in between. I can easily do this without any ill effect.

Thanks for your help.
 

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Hi Raymond S.

Here's my question, are your plants growing well without noticeable deficiencies? If they are growing well there should be no need to add GH Booster; your water must have adequate K, Ca, and Mg in it already.
 

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I feel they should be growing quicker. But borderline on light right now.
Had disaster because of neglect due to health reasons. Everything a mess but coming
back. No visible deficiencies yet. Just slow growth(from slow growth type plants which have grown faster).
Had an overpopulation of scuds happen which ate lots of my plants. Trying to remove them slowly because they are the food for my fish so don't want to just poison them
or do anything else that would completely wipe them out.
Have a Dwarf Gourami in there right now to cut down on them.
 

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Hi Raymond S.

I can relate to health problems, was laid up for almost 5 months this winter. Slow growth can be a lot of things, if you have fluorescent lamps and haven't changed them in the last year that is where I would start.
 
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