Which one? Kuhli loach or porthole catfish.

I dont know which to get. If they have a Kuhli that is good sized i will get over porthole but if they have only small ones i might get porthole. Which is better in general in terms of hardiness and in behavior?
 
I dont know which to get. If they have a Kuhli that is good sized i will get over porthole but if they have only small ones i might get porthole. Which is better in general in terms of hardiness and in behavior?
Don't know about the porthole, but be aware that kuhli loaches are scaleless and very sensitive to medication and water cleanliness. They also should be kept in groups of greater than 4. They are very social and if you want to see them out instead of hiding you need a larger number. Also, your tank needs to be at least 15 gallons + 5 for each loach. Things to consider. Hope it helps.
 
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