Originally Posted by Little Soprano
I have a Hanna PH pen on the way but here’s my stats via API haha
PH: 6.4 (tap is 7.8ish)
KH: 60 (6 drops)
GH 140 (7 drops)
Hi @Little Soprano
Thank you for the additional information.
What I see in the photos are new leaves with interveinal chlorosis (dark leaf veins with lighter areas between). Leaf margins are wavy or curling. One species is showing 'hooking' at the leaf tips. In addition the newest leaf is gelatinous and having trouble unfurling.
Normally I would suspect an iron deficiency causing the interveinal chlorosis but I don't think so in your case. I suspect that the problem is a lack of magnesium which typically shows up first on older leaves but if the magnesium level is so low their isn't sufficient in the older leaves that the plant can 'steal' it can can show up on newer leaves. The wavy / curling leaf margins are also a symptom of a magnesium issue as are the leaf margins curling up or down.
II. Symptoms do not appear first or most severely on youngest leaves: Effect general on whole plant or localized on older, lower leaves.
C. Interveinal chlorosis. Interveinal chlorosis first appears on oldest leaves.
1. Older leaves chlorotic, usually necrotic in late stages. Chlorosis along leaf margins extending between veins produces a "Christmas tree" pattern. Veins normal green. Leaf margins may curl downward or upward with puckering effect. Necrosis may suddenly occur between veins. Potassium or calcium excess can inhibit uptake of magnesium...magnesium deficiency
When the external magnesium supply is deficient, interveinal chlorosis of the older leaves is the first symptom because as the magnesium of the chlorophyll is remobilized, the mesophyll cells next to the vascular bundles retain chlorophyll for longer periods than do the parenchyma cells between them. Leaves lose green color at tips and between veins followed by chlorosis or development of brilliant colors, starting with lower leaves and proceeding upwards. The chlorosis/brilliant colors (unmasking of other leaf pigments due to the lack of chlorophyll) may start at the leaf margins or tips and progress inward interveinally producing a "Christmas" tree pattern. Leaves are abnormally thin, plants are brittle and stems have a tendency to curve upward. Stems are weak, subject to fungus infection, usually leaves drop prematurely; plant may die.
The 'hooking downward' of the leaf tips and the gelatinous appearance of the new leaf are symptoms of a calcium deficiency.
I. Symptoms appearing first or most severely on new growth (root and shoot tips, new leaves)
A. Terminal bud usually dies. Symptoms on new growth.
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 stem topple may occur. Roots are stunted. Downward curl of leaf tips (hooking) occurs near terminal bud. ammonium or magnesium excess may induce a calcium deficiency in plants... calcium deficiency
Differentiating between calcium and boron deficiency symptoms: When calcium is deficient, there is a characteristic hooking of the youngest leaf tips. However, when boron is deficient, the breakdown occurs at the bases of the youngest leaves. Death of the terminal growing points is the final result in both cases.
Fortunately these issues are easy to address and remedy. Purchase a bottle of Seachem Equilibrium which contains calcium, magnesium, potassium, iron and manganese. If the treatment is effective order some 'generic' GH Booster by nilocg.com, greenleafaquariums.com, or aquariumfertilizer.com all of which are similar to Equilibrium but less expensive.
Do an initial dose of one (1) teaspoon per 10 gallons (or one (1) tablespoon per 30 gallons). Thereafter when you do your weekly water change dose one (1) teaspoon per 10 gallons of new water
added to the tank (or one (1) tablespoon per 30 gallons of new water added to the tank). This should increase the hardness of your tank by about 2.0 dGH and add sufficient magnesium and calcium to cause a noticeable improvement or eliminate the deficiency symptoms. Sometimes it takes more that the dose I suggested but lets do this for two weeks.
Now watch the new leaves as they emerge for the next two weeks; do not watch the existing leaves....they will not change.
What you should see is the new leaves look healthier, do not have the gelatinous leaf tips, the hooking of the leaf tips should diminish, and the rate of stem growth may increase. Hopefully the magnesium will also improve the interveinal chlorosis and curling leaf margins we see.
Keep us posted as things progress! Pics are always appreciated! -Roy