My 15 gallon nano

Here is my 15 gallon mixed nano, im trying to convert to a sps dominant tank. Everything seems to be doing excellent, especially since i started dosing Builk reef supplies 2 part supplement. Im running a 175watt metal halide, along with one actinic plus t5 and i 10,000 k t5. I have a 10 gallon sump with a drilled overflow, 2 koraila nanos, a minijet 606 and a quiet one return pump. I use a junky oddysea skimmer rated for 75 gallons but it works just fine with this small tank.