Which Algae Eating Fish To Get

The brown algae is most likely diatoms caused by the ammonia in a new tank - even trace amounts that are too low for our testers to detect can cause diatoms.

Strictly speaking, you shouldn't buy a fish to get rid of algae; you should find the cause of the algae and cure that. But algae eaters do make an attractive addition to tanks.
At 48 litres, your tank is not suitable for any algae eating fish. The only one that would physically fit needs to be in a shoal, and a 48 litre tank wouldn't be able to grow enough algae to feed a shoal. But that doesn't mean there aren't creatures that would work. Shrimps and snails eat algae. At 48 litres, I would look at cherry shrimps and/or nerite snails (making sure they are the freshwater ones not the salt water type). But I would wait to add them last. Shrimps and snails are more sensitive to ammonia and nitrite than fish are. You need to wait till you have all your planned fish, and the tank has run a few weeks without problems before getting any. Until then, I'm afraid it's up to you to clean the algae off.

Hi Guys,

Many thanks for the quick replies. Looks like i will be cleaning algae for the next couple of months
Once i have my full stocking levels i think the cherry shrimp sounds a good proposition.

Just think about what to stock, it would be great to have some colourful fish. What suggestions would you recommend from the fantastic fonts of knowledge you all have.

Look forward to your response.
Jay