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/
no2 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.
Your
no2 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/
po4? Your excessive algae could be the result of it. Lighting during the cycle certainly didn’t help but it should be fairly minimal.