Algae blenny will not nip the sps. I have mine in my sps tank for more than a year. Only target algae on the rocks and glass.
Try to check your water parameters such as nitrate or phosphates on why you have algae problems.
Gotten from me...
Very strange appearence on the cheato. Could be some rotting stuff. The rest of the bunch is quite good. Should be ok after climatised to your tank.
Dah bikin semalam. Dulu wa tak tahu sangat...
Tapi manual wa tak cekak pun 6ohm, brapa wattage boleh drive. Tapi semalam biler dah switch to proper impendance, nak kena put volume almost 1/2 baru kuat sket..