Great!

No such thing as different types of L134. Its L134 or its not.

Bad reviews and feedback from previous buyers.

Thank you for the bigger and better photos.

I agree. I always shy away from these Gold Nuggets and other Baryancistrus as they are known to be very difficult to keep in the hobby. Why not add one more Mustard Spot, since you already have one? Together with the Bristlenose, you can feed them a steady diet of plant-based food. Just a suggestion ...

Very informative article. Thank you very much!

Been seeing these sold online. While some are listed as L333 Black and Yellow. Which is the true L333?

I've seen this on my L104s before. Yes, nothing serious. Redness usually last a couple of days, once the fight for caves or spots end.
Large females do occupy caves even if they are not about to spawn. Furthermore, they can become very aggressive and evict smaller males from their hiding spots.

Had great success with Quick Cure. But timing is key. Best when applied on the first sight of spots. Pretty useless when spots are pretty much all over the fish and lethargic behaviour is observed.

Sick. Perhaps too much protein consumption. They are better off with vegetables (squash/zuchini) and less protein tabs such as algae wafers.

Bloated male.

Had one like this before. Not L095 IMO. More like L152 perhaps?

They look pretty young. Perhaps another year or two. Enjoy them for now.

Looks like too young to determine.

Male.

Male P. Maccus.

I agree, one female and two males. Head shape alone is not enough. Body shape (girth) and odontal growth should also be considered.

You need to post some pictures for us to help you. Catch them, place them in a basin then photograph them from the top.

I'd be careful with using black sand in cory tanks for a long period of time. Yes, they are pleasant to look at but these are really unnatural for the cories. Run your fingers through a bucket of these black sand and you'll notice that these aren't real sand.
Used Carib Sea Tahitian Moon Sand in ...

Stress perhaps, due to lack of wood from previous seller or disease caused by parasites. Some sellers tend to keep their livestock in inappropriate settings with the least available care possible. Are the eyes and bully sunken?

Agree, the biggest one in the second pic is male. The rest are not yet fully mature but I can see potential females based on body shape and odontode growth. These are slow growers IME. Good luck!

Yes, all of them are Hypans. The first batch are 201s IME. The others with the bigger spots look H. Contradens. Then again, photos were taken during stressful conditions, which could somehow make identification more challenging. Nevertheless, they all look very good!

Hypans indeed. Looks L-201, IMO.

Based on the shape of the mouth from the first photo, Leporacanthicus indeed. Zero chance to be a Scobinancistrus or Hypancistrus. L007 perhaps, but need better photos to be sure.

L177 / L018.

They are omnivores and will try a lot of different foods. But I haven't seen them scrape algae off the glass like my L001. Perhaps you'd like to try an L001, a P. Pardalis, or one of those beautiful Hypostomus.

Introducing a bigger L014 to a smaller one seems illogical in my opinion. From experience, I have learned that these beautiful and often popular fish are capable of being aggressive and territorial towards their own specie. Moreover, they grow pretty quick because they are voracious eaters! They ...

Kinda bloated based on those pics but not to the extreme (yet). Perhaps been eating more carnivorous diet.

With the vast number of Ancistrus species, it would be difficult to determine based on the angle of those shots. Best to catch it, measure it, and take close up photos from the top.

Hard to tell based on the angle of those shots. You need to catch it and take a close up photo from the top. You can also wait for a year or so and see if there's significant odontodes.