for me i am also using a 1ft tank i do add salt to my tank de erm for me 100% 3/4 teaspoon of salt then weekly wc 50% is abt afew small pcs of salt nor about there slowly see yourself nor
those that no filter in my tank i i use my main 1ft water then top up then maybe add 1 -2 pcs each wc is about 20-40%
P.s it may work for me may not work for you up to you to follow haha