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Discussion Starter · #1 · (Edited)
I think I have the answer but I would like to here from some of you if I am right or if you may have a better idea.

New leaves on one of my swords grow in pale and a bit yellow though still green but not white.

Another stunted sword have twisted and curling leaves. Been this way for a long time.

My large water sprite is bright greenish yellow. Growing well but I'm not sure if it should be a bright greenish yellow or more on the green side. The old growth turns a darker green and then almost a brownish color. It kind of looks like its dying or maybe melting. It isn't just in darker less lighted area's but all old growth.

My thoughts are because Magnesium prevents the proper use of Iron leading to pale leaves and possibly low Calcium leading to twisted and curling leaves that I have a Magnesium and Calcium shortage. What do you all think? If I am right please advise me on what product to buy.

29 gallon tank (maybe 24 gallons of water) heavily planted and over populated tank.
Because one of my ballast went bad just recently I now have 65 instead of 130 watts of CF.
I dose E.I.
KNO3 1/4 tsp
K2S04 1/8 tsp
KH2P04 1/16 tsp
on off days:
CSM+B 1/4 tsp
Iron 1/16 tsp (just recently started adding).
100% Flourite
at least 50% water changes weekly
PH 6.4 to 6.8 (tap water PH is 8.0)
KH 5.5 to 6.0
GH 8
C02 is high. Just below where the fish don't gasp at the surface.
I had is set to about 41ppm to the chart and upped it up a bit until the fish started gasping and then down just a bit so they stop.
Temp is 76 degrees.
Ammonia 0
Nitrite 0
Nitrate I try to keep it near 20 but it has been higher because of replanting I think and it slowed plant growth temporarily.

Thanks

Joe
 

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Discussion Starter · #5 ·
Tap water is KH 6, GH 8, no nitrate.
I dose E.I. which is every other day macro's and on off days micro's. With a weekly at least 50% water change.
 

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Discussion Starter · #7 ·
Yes thanks Tom. I seen your answer and added a couple other questions.
 

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Buy a Ca test kit...

Don’t shoot in the dark. Go get a Ca test kit (Hagen make one) and by bonus if you have a Gh test kit you will know your magnesium concentration right away. Now, that’s 2 important factors you can monitor.
 

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New leaves on one of my swords grow in pale and a bit yellow though still green but not white.
Look like Iron deficiency or blockage

Another stunted sword have twisted and curling leaves. Been this way for a long time.
Look like Calcium deficiency or uptake problem. Calcium is rarely deficient in freshwater aquaria.

Other Alkalis, if to low or to high, can influence calcium uptake.

> K > Na > Mg > Ca

Boron have influence on calcium uptake, but the margin between helping and being detrimental is narrow and not clear.

A safe (tested) number will be under .05 ppm


My large water sprite is bright greenish yellow. Growing well but I'm not sure if it should be a bright greenish yellow or more on the green side. The old growth turns a darker green and then almost a brownish color. It kind of looks like its dying or maybe melting. It isn't just in darker less lighted area's but all old growth.
In my opinion It’s probaly more overdose than lack of nutrients...


My reading for my 33 gal is

PH 6.2
No3 = 4 ppm
phosphate = 1
fe= .4 ppm
small amount of K is added
 
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