Conflicting info on diuretics use in ckd4 with hyperkalemia issues (low aldosterone) with 2 g proteinuria. will 20 mg lasix (furosemide) daily dose harm kidney?

Follow MD advice : You already have kidney problems and should be monitored by a kidney specialist. Follow their advice closely rather then trying to treat yourself. What is appropriate for your problem is best determined by some who does this for a living then try to make sense of all the information that you get from your well meaning friends and the internet