The Nano Clone has a positive ground power supply. It needs to either be on it’s own isolated power supply or a supply with other positive ground effects.

From the manual:

PLEASE NOTE: If the Nano Clone is connected to other effects pedals it will not work with the same battery eliminator that is daisy chained to the other pedals. The Nano Clone works off of a negative power supply and therefore either needs its own battery eliminator or should be run off the battery. If you do daisy chain your battery eliminator to the Nano Clone, all of the pedals on that daisy chain will power down, including the Nano Clone. If this happens, immediately remove the Nano Clone and give the Nano Clone its own power supply, otherwise you risk damaging the Nano Clone, your other pedals or the battery eliminator. Do not daisy chain the battery eliminator for the Nano Clone with any other Electro-Harmonix pedals except for the EH Muff Overdrive pedal.

DO NOT USE THIS!!! using that will fry the pedal, that changes the centre negative to positive, the nano clone uses a regular Boss centre NEGATIVE power supply.

The optional 9V power supply from Electro-Harmonix is US96DC-200BI (same as used by Boss ™ & Ibanez(tm)) 9.6 volts/DC 200ma. The barrel connector on the front of the Nano Clone is for the 9-volt battery eliminator capable of delivering 100 mA of current. The inner ring of the 9-volt battery eliminator must be negative, the outer ring positive.