Here is a direct quote from their main page:
..sorry to all if it is "old news"...
After 10 years supplying scuba gear, Divetank is has decided to close it's doors. To serve our scuba customers, Divetank has chosen the industry customer service leader ScubaToys.com to help our customers scuba gear needs. If you are looking for the best service, price and selection on scuba gear, you won't be dissapointed when you deal with ScubaToys.
..sorry to all if it is "old news"...