What deficiencies?

I am dosing with nilo g thrive every other day and have co2. The plants leaves curl as they age. The giant hygros leaves come out deformed. What can dose to fix this?

I’m thinking it’s calcium. Suggestions?

No, it is not calcium. Calcium deficiency will show as blotches on the leaves that will be brown, caused by iron deposits. Cell membranes have a phospholipid bylayer that is stabilized by calcium. Iron will replace the missing calcium, so iron excess symptoms replicate the symptoms of insufficient calcium. I have very soft water and had this issue (calcium deficiency) previously.

I won't guess as to the issue here because I am not experienced with CO2 addition nor do I know the "nilo g thrive" mentioned, and your lighting obviously factors in as well. The light/nutrient availability balance can bee off due to various excesses, deficiencies, or light.