New bottom feeder

Looking to add some new bottom feeders to the tank ( 40 gallon tall, cycled, sand, 75% stocked) the species I'm looking at are,
Red tailed shark
Albino rainbow shark
Pictus catfish
Golden dojo loach

Pictus I don't know about cause I have glo light tetras. I also have 2 peppered Cory Left after loosing 6 to barbel loss unfortunately and am just not ready to re expand the shall at the moment. I also have a bumblebee cat.

 

What are the dimensions? I don't think your tank is long enough for any of those species if it's a tall. What about kuhlis?

 

I'm approximating, 24" tall 18" wide 22" long

 

Yes, unfortunately none of those fish will work.

 

Agreed. Also Bumblebee Cats should be in a group of at least 5-6...

 

Agreed. I'd do kuhlI loaches instead of those.

 

What kind of substrate do you have? kuhlis like sand because they burrow. If you've lost corys because of barbell loss it may be because it's getting torn off by gravel.

 

Pictus should also be in a group of at least 5-6. And you shouldnt put more than one shark in a tank.
Other than these reasons, I agree with above. Your tank is unfortunately too small for these species