Ive heard conflicting things. Can/should a single pleco be added (a species that maxes out <5") to a 50gal tank that has 6 gold zebra loaches? I was told either loaches OR plecos but not both, but Im not sure why. If its a bottom dweller thing I also have 3 bolivian rams (i dont think thats a factor, mentioning it just in case). I dont have anything that eats algae so there shouldnt be competition there.