Question about planted aquarium and fishless cycling

Decided against the panda Cory because of my alkaline water and gravel. Got any suggestions for a bottom dweller algae eater that likes alkaline water?

Remainder of my fish seem to be doing well after 30% water exchange. That wasn't as bad as I thought it would be with fish in the tank. The remainder 4 guppies seem to be doing good, they are actually getting to the food before the zebra danios now. The Danios sure do like to chase each other around. Every once in a while one will chase one of the guppies but doesn't last but a second or two then they are off in another direction.