De filter grids + acid?

Generally, acid is not required or even the best way to go at first. You don't want to use acid without first using a degreasing product like TSP. Organic oils on the filter can harden and permanently damage the filter if they are still there when you use acid. Usually TSP, or automatic dishwashing detergent, is enough to take care of everything. But if you have calcium scaling on the filter you follow the TSP with acid to remove the calcium buildup.
 
Thread Status
Hello , This thread has been inactive for over 60 days. New postings here are unlikely to be seen or responded to by other members. For better visibility, consider Starting A New Thread.