I usually do a 50% water change weekly. And honestly once my tanks have been going for a few months I never add dechlorinator. And the could be why my dirted tank is like that. I just too off straight tap.
Yikes. That is probably not a good idea! Your water source must have fairly low levels of chlorine when it reaches your house otherwise you'd likely lose fish and burn plants. Best to add dechlor every time you do a water change or remove it in some other way, it really isn't good for living things.
Also, at certain times during the year the water companies will flush out the pipes by increasing the chlorine level to kill off anything in them. If you do a water change during one of these flushes there is a good chance you'd lose everything in your tank.
Looking back at your plant photos, I noticed that while new leaves are mainly affected the curling extends quite far down the stems which isn't really typical of calcium deficiencies. Calcium issues will affect the top 2-3 sets of leaves maximum and the rest of the plant will be fine. Also, the curling you see with calcium issues looks more like deformed growth rather than fully formed normal shaped leaves that are just bent. Chlorine damage bends normal shaped leaves.
Check the www.DeficiencyFinder.com
for calcium deficiency signs in other plant species. You'll see the physical deformity that goes along with the twisted leaves which is not really what you see in your plants.
If I wanted to add the gh booster how do u think I should dose it since I only dose weekly. But the tanks I've had over the last year I've never seen this happen before and like I've said I didn't use the dechlorinator. So I'll give it a shout
I'd hold off on adding the GH booster for now. Give the plants a week or two to recover from the chlorine. I bet you'll see improvements in the new growth. If you add calcium now and dechlor and the plants recover we won't know which caused the plants to respond and I will be unable to add it to the Deficiency Finder. Furthermore, there is no reason to add extra calcium unless you have to. A low GH value is preferable especially for Ammania and Rotala species.