I used a corner type sponge filter from the LFS. I have been doing water changes as well. When I do my water changes I siphon off all but the last inch or 2 in the bucket where sludge resides. I then squeeze the nasty stuff out of the sponge filter. I move the rots over to a fresh bucket with about 2 liters of their water. The fresh bucket has 2.5 gallons of freshly mixed saltwater that has been PH, temp and salinity matched. The sponge filter is not yet a week old so it is very possible it has not had a chance to cycle. As for the phyto, I was running DT's phyto keeping the water tinted light green, a little darker in the evenings so it would last thru the night. Yesterday I just got some Instant algae and set it up with a peristaltic pump I had laying around, still trying to dial it in. I can automate the feeding but the frequent water changes are making this a big hassle.