I have a 60litre tank with internal filtration which houses 4 zebra Danios and 4 pearl danios. I have just added a Hillstream loach and am having trouble getting the algae wafers to it as the danios get there first. The tank has a fairly high flow rate and good aeration and is mainly furnished with pebbles and gravel and some Vallis for plants. Any tricks/ideas would be much appreciated.