that 'darn algae eater' is also a murderous so-n-so .... seriously, don't go there. They've been known to eat some fish alive, latching on to them and eating their slime coat until they die. Horrible little blighters.
As for the 'fish guy' .... sounds like a staff member in a certain large British chain pet store. They seem to have at least one in every store lol
The best place for advice is here. We have nothing to gain from misleading you and if one person doesn't know the answer to your query someone else always will.
From what I've gathered you've got then now is
10 neon tetra (all good, a good number to have)
6 Harlequin Rasboras (not too bad but they'd do better in a larger group - similar to the neons, around 10)
6 peppered cories (all good there too)
So with your tank size I'd look to add 4 or 5 more harley's and if you want to go down the ram route you'll be fine, but I wouldn't add any more than 2. If you can get a paired up male and female you'll get to watch the relationship between them. My rams were kept with harley's and tetras and cories and I never had any problems. You could also add some more cories, although the peppered variety are on the largest side of cory species you could still get away with adding another group of 6 of another type. There are so many different types of cory and the more you have the better as cories are really social fish. I currently have 5 different types of cory in my 240 litre and they all tend to hang out together. My youngers ones all play together, it's really nice to watch
As for the 'fish guy' .... sounds like a staff member in a certain large British chain pet store. They seem to have at least one in every store lol
The best place for advice is here. We have nothing to gain from misleading you and if one person doesn't know the answer to your query someone else always will.
From what I've gathered you've got then now is
10 neon tetra (all good, a good number to have)
6 Harlequin Rasboras (not too bad but they'd do better in a larger group - similar to the neons, around 10)
6 peppered cories (all good there too)
So with your tank size I'd look to add 4 or 5 more harley's and if you want to go down the ram route you'll be fine, but I wouldn't add any more than 2. If you can get a paired up male and female you'll get to watch the relationship between them. My rams were kept with harley's and tetras and cories and I never had any problems. You could also add some more cories, although the peppered variety are on the largest side of cory species you could still get away with adding another group of 6 of another type. There are so many different types of cory and the more you have the better as cories are really social fish. I currently have 5 different types of cory in my 240 litre and they all tend to hang out together. My youngers ones all play together, it's really nice to watch