Does anyone know anything about Bulkhead stoppers?

[manvil12e]

i need to plug the bottom three 2'' holes of my 110 gal tank.. and i need to seal it shut so no watter comes out.. im going to use a fountaun filter on top instead of using the bottem holes.. do u know what i should use? i think they are called bulkhead stoppers but idk where to get them.. if u can give me some suggestions i will appreciate it.. :help: thank u

 

[Mgamer20o0]

http://www.marinedepot.com/ps/ps_searchItem.aspx?IdCategory=&SearchText=bulkhead

i got one on ebay really cheap. couldnt find the right cap so i just went to home depot found one that was close and siliconed it together. it works fine.