Well I would remove the filter pad, Do a water change and buy about 60 more lbs of live rock. You do not have enough bio filtration in your tank. With the two tangs you will need alot of bio filtration. Your skimmer is ok for now just make sure to keep it clean. With lighting and nem, corals it;s not the wattage but the intensity of the lights that matters. You could have 5000 pc watts but only have 80 par at your sand bed. I have a 75 with a 6 T-5 retrofit kit and I have 171 par at the sandbed. Good luck and if you have any questions please ask them here at MFK!!!