I think you meant to link to this clean up crew
If so then it’s worth the money imo
if your lfs
doesn’t carry the same stock.
Once your nh3
reach 0 I’d perform a 50% pwc
a day to two before adding the clean up crew.
I would also drip acclimate
them for about 3 hours before adding to the tank to adjust to your ph/sg
will likely drop to 0 within the next couple of days but personally I’d wait until it was closer to .25 ppm
or undetectable before ordering your stock to make sure.
Also I’d hold off on the lawnmower blenny for about 4+ months for your tank to stabilize a little more since their survival rate in a newly established aquarium is pretty poor.
The clean up crew will take care of the brown algae but will more then likely do little to the slime algae you mention. Manual removal using a used toothbrush/siphon vacuum is the easiest way.
Do you use tap water and if so have you tested the tap for no3
? Your excessive algae could be the result of it. Lighting during the cycle certainly didn’t help but it should be fairly minimal.