Originally Posted by treemanone2003
Petco does not sell TopFin. They sell Aqueon. PetSmart sells TopFin. It's generally every 3 or 4 months and includes 10, 30, and 40b as well.
You are correct its Aqueon not Topfin! The 30 gallon is officially called 29 gallon and has same footprint as a 20-long.
Be sure to call/check all petcos near your area as inventory is highly variable. I have 6 petcos within an hour's drive from me. Some had a dozen 20 long tanks while others had zero.
The most recent sale was held during the first two weeks of April 2014 (I remember this fondly as I bought 6 aquariums).
If you plan to get many tanks and need a nice modular stand that can stack many tanks one on top of one another, look into Home Depot Husky Steel Shelves (online and in store). They are all-steel and hold 800 to 1000 pounds PER SHELF. Note that a loaded 10 gallon weighs about 100 pounds. Avoid shelves with particle board material even if it claims it can hold 500 pounds per shelf and even if Husky brand. Those got bad reviews online - particle board can loose integrity when frequently wet and lead to a disaster.