Without anabolics, you won't 'keep' any gains on t3. That stuff is catabolic. I would recommend running some Winstrol (winny) or ox with it, but if you don't, you should still get some decent results off it.
Here is a sample dosing:
12.5mcg for 5-7 days
37.5mcg for 5 days
75mcg for 15 days
50mcg for 5 days
37.5mcg for 5 days
25mcg for 5 days
12.5 mcg for 5 days
6.25mcg for 5-7 days
This is just a sample and there are other methods and dosing schedules.