Yeah we had that same storm. My FC was 1 today...barely! You gave us GREAT info: Your cart has a rating of 80gpm and your sand 25gpm. IMHO isconnect the sand filter and use the cart. It has far greater capacity and, at its root, filters better.

It's not that live algae is the same size as dead algae, it's that as long as algae is live it keeps making MORE algae to filter out. Dead algae doesn't.

Carl