I put a stop to that schedualed fill crap. I have my tank filled twice a year. Once just befor breedin season and about now. I check my tank quite often. The rep would call "commin out for a refill" I would check my tank and it would be over half full. No thanks. If I was usin it heavy durin breedin season have it filled once after but when it just bein opend to check the liquid level durin the off season I dont need that every six weeks stuff. Oh yeah 25.00 a fill