He did some calculations as my area as it is supplied by four treatment plants.Revers Osmosis water. filtered water that has almost all minerals removed.
I suggested that you Don't trim or remove plants. My recommendation is to Solve the nutrient deficiency first! Trimming them when they are weak could kill them.
Determine what your GH is and then lest us know. If it is low consider boosting GH. Another question how often do you do a wterchange and how much water do you change out?
"The KH and GH vary so averaging the data the results fall within the 0-4 dGH/dKH zone, around 2 usually for both. Which is soft/very soft water in terms of hardness".
I'm going to change the fish in my tank. What should I do about the plants?