Could I get 6 Otocinclus affinis?

[TwoTankAmin]

IMO you could get a single bristlenose (Ancistrus). They are available in a various sizes but many will get about 5 inches max. As long as it is a single there is no concern re sex. Females have way fewer bristles than the males.

Ancistrus claro is 2.6" SL, Standard length does not include the tail in the measurement. Som this fish should only get to about 4 inches max or a tad more. This is OK for your tank size. One thing about the ancistrus is because they are Aufwuchs feeders they are after algae all the time. So they tend to be in places where you will see them. If you get a male you should get a cave for it.

Another similar sized Anscistrus which is pretty neat looking, if you can find it, is the L519 aka Honeycomb Bristlenose. It can get to 4-5 inches.
https://www.planetcatfish.com/common/species.php?species_id=8213

The smaller bristlenose when kept alone are basically mellow and bothers nothing. I even have single BN in two tanks with breeding Blue Dream Neocaridina. One such tank is 15 gallons and the other is a 29 gal. Noth are heavily plantedYour 105L is just under 28 gallons. The greatest risk with a BN in a smaller planted tank is the BN can trash more delicate plants as it roots around looking to rasp algae anywhere it is growing.

However, I am not sure if you will have enough algae in your tank to feed the shrimp and a bristlenose, especially when it is an adult. So, you may need to provide your algae eaters with commercial food. You can also feed them veggies like zucchini aka courgette. I have even fed this to Neocaridina.

Ancistrus are poop machines, so you will need to be sure to use your tank vacuum on a regular basis because your tank is on the small side.

 

[ambrosia04]

IMO you could get a single bristlenose (Ancistrus). They are available in a various sizes but many will get about 5 inches max. As long as it is a single there is no concern re sex. Females have way fewer bristles than the males.

Ancistrus claro is 2.6" SL, Standard length does not include the tail in the measurement. Som this fish should only get to about 4 inches max or a tad more. This is OK for your tank size. One thing about the ancistrus is because they are Aufwuchs feeders they are after algae all the time. So they tend to be in places where you will see them. If you get a male you should get a cave for it.

Another similar sized Anscistrus which is pretty neat looking, if you can find it, is the L519 aka Honeycomb Bristlenose. It can get to 4-5 inches.
https://www.planetcatfish.com/common/species.php?species_id=8213

The smaller bristlenose when kept alone are basically mellow and bothers nothing. I even have single BN in two tanks with breeding Blue Dream Neocaridina. One such tank is 15 gallons and the other is a 29 gal. Noth are heavily plantedYour 105L is just under 28 gallons. The greatest risk with a BN in a smaller planted tank is the BN can trash more delicate plants as it roots around looking to rasp algae anywhere it is growing.

However, I am not sure if you will have enough algae in your tank to feed the shrimp and a bristlenose, especially when it is an adult. So, you may need to provide your algae eaters with commercial food. You can also feed them veggies like zucchini aka courgette. I have even fed this to Neocaridina.
View attachment 383614

Ancistrus are poop machines, so you will need to be sure to use your tank vacuum on a regular basis because your tank is on the small side.

I love bristlenoses but I feel they may be too big and I really don't want them to mess to much with my plants hahaha
I'm planning a future tank with them in mind tho
I wanted the otos bc I love their little suction mouths and find grazing fish adorable, that's why I went more for the hoppeis as their temp range is also more aligned to Spain's temps
Tho another person told me shrimps and snails would out compete the otos and the may starve
so no otos for me i guess, I'll keep researching to see if they wold truly be miserable here

 

[Naughts]

Tho another person told me shrimps and snails would out compete the otos and the may starve
so no otos for me i guess

The main problem is the size of the tank, with shrimp and snails compounding the issue. As you rightly noted, they are a shoaling fish so are optimum with six or more. To feed such a group it is necessary to provide a large surface area and a 105l is limited in that regard.

 

[anewbie]

I don't know - i keep otto in my 29s (about the same as as a 27) all the time but of course they are with n. marilyn and dwarf cichild of various species so i guess there is less competition for algae. I'm not overly concern about the shrimps out competing them but i suppose it is possible. Also i keep a lot of decaying leaves in my aquariums and that seems to help.

 

[ambrosia04]

I don't know - i keep otto in my 29s (about the same as as a 27) all the time but of course they are with n. marilyn and dwarf cichild of various species so i guess there is less competition for algae. I'm not overly concern about the shrimps out competing them but i suppose it is possible. Also i keep a lot of decaying leaves in my aquariums and that seems to help.

I do put indian almond leaves in and have some snail/algae pellets but I'm still debating hahaha