Originally Posted by modenacart
... The seedings are seeds I grew from tangerine and clemintine seeds. ...
The Clementine is a kind of Tangerine, so your seedings are all Tangerines -- or more formally: Manderins. My first pick for grafting on to them would be "Gold Nugget", and the second "Owari Satsuma". Here's an idea for you: order one of these online from Four Winds Growers
and when it is growing healthfully, use it as a source for graft material onto your seedlings. If you do order one online, make sure you follow their instructions and have a pot w/ soil ready to put it in: the plant will arrive bare root!