we dumped a few hundred pounds of gray water and black water at the dump station, then drove to town and larry dropped me here. apply cleaner to both the clean and dirty side of filter. (be objective when you ask yourself this). they brought us extremely high quality products, always delivered on time and were extremely efficient. it’s your decision but i know you will manage two in your first days. was that all the girls needed to say? set aside to harden, this can take up to 1 hour depending on how warm your home is. 