Hi Chad,
Yeah that's diatom algae for sure. It is an algae that is highly common in newly set up planted tanks and can be a bit of an eyesore especially when it gets out of hand. Although saying that, after a while it does start to subside and disappear once your plants settle in and the tanks ecosystem is somewhat stable.
Keep the CO2, lights and fertilisers going - don't reduce or get rid of any of them. Keep the plants happy and the algae will eventually go away.
What you could do in the short term is manually remove the algae yourself. By this you can use a soft bristle brush (or an old toothbrush) and gently brush off the diatom algae from plant leaves. It is a very tedious task but perseverance pays off in the end. After you do this task, a water change should be performed to help remove a vast majority of the diatom algae from the water column.
As well as this, regular cleaning of your filter, media and tubing is good practice. As you may be aware, never rinse filter media in tap water.. always use old tank water to rinse filter media etc. This will help reduce the build up of organics etc that could contribute to undesired algae growth.
At the end of the day, diatom algae will happen in newly planted aquaria so unless it gets out of hand, it will go away on it's own.
It would be wise to introduce some true Otocinclus Affinis into the tank and I would highly recommend Amano / Red Cherry Shrimps too providing your water contains Calcium and Magnesium (i.e. a optimal GH level).
I hope that helps,