Hi soundline,
Let's see: interveinal chlorosis on new growth (typically an iron deficiency); new leaves showing puckering (typically a calcium deficiency); leaf tips 'hooking downward' (typically a calcium deficiency).
To resolve these conditions I would start by adding Seachem Equilibrium to your tank. Add sufficient to increase the hardness by 2.0 dGH; 1 teaspoon per 10 gallons. Add twice the first week; then add when doing water changes (if adding 10 gallons of new water add 1 teaspoon). Equilibrium contains calcium, magnesium, potassium, iron, and manganese. If the interveinal chlorosis continues happening on new leaves as they emerge even after adding the Equilibrium then add Seachem Flourish Iron. Typically one dose per week should provide sufficient iron along with the iron in the Equilibrium. Don't expect plant leaves that have already formed to change, they likely will not. Watch the new leaves as they emerge for positive changes.
These are not uncommon deficiencies here in the Northwest with our very soft water. Questions? Just ask!
