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WARNING AND SAFEGUARDS

• 

This product may contain chemicals known to the state 

of California to cause cancer and or birth defects or other 

reproductive harm. Wash your hand after handling this 

product.

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It is your sole responsibilities to verify that the plug and 

the receptacle are clean and free of moisture and salt 

build up at all times. The receptacle must be free of water, 

salt, calcium, magnesium and dust. Failure to do so can 

cause fire, damage to property, permanent damage to the 

product and personal injury not limited to loss of life. 

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Do not plug into extension cord/power strip.

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A drip loop must be used when plugging all electrical 

aquarium devices. A drip loop is that part of the cord 

hanging below the receptacle.

• 

The national code requires that a GFCI (Ground fault 

circuit interrupter) be used in the branch circuit supplying 

all power to water pumps and electrical aquarium 

equipment. If you do not have a GFCI, have an electrician install one prior to 

operating any aquarium component.

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Reads and follows all instructions.

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 Use this product for its intended use only.

• 

 Never yank or pull the cord from the electrical outlet.

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 Do not operate if the plug or wire is damaged.

• 

 Do not operate without water.

• 

 Verify that hands are dry prior to disconnecting the power.

• 

 To reduce the risks of electrocution, keep all connections dry.

• 

 While working on the skimmer and/or aquarium, disconnect all aquarium 

appliances from power supply.

• 

 If the product is to fall into water, do not reach for it first. Unplug the unit first 

then retrieve the unit from water. If any of the electrical components get wet, 

unplug immediately.

INStAllAtIoN

The use of water conditioners (some de-chlorinator, aqua safe, stress coats, 

algaecides, and red slime removers) will increase the surface tension. As 

collection cup fills dump water and repeat until skimmer is working properly. Run 

a carbon filter to remove all impurities. Check with your local fish store for water 

conditioner that will not affect the performance of the protein skimmer.

1.  Remove the collection cup and wash well with a mild dish detergent and rinse 

with warm water. Insure all the detergent is removed from the collection cup. 

Replace collection cup.

2.  Install water level control.

3. 

Remove the filter cartridge from the plastic bag.

4.  Fill the main body of the skimmer.

5.  Verify the tank is full of salt water with a salinity of 1.020-1.025.

6.  Remove the lid from the collection a cup. Plug in Rio

®

 Nano Skimmer

  

into a GFCI outlet.

7. 

Close the air flow control valve and plug the Rio Nano skimmer into a 

 

GFCI outlet

8. 

The skimmer will begin to prime, keep the air flow control valve closed until 

water fills the intake tube and water begins to cascade back into 

 

the aquarium.

9. 

Open the air flow control valve to that air begins to enter the skimmer, start 

the skimmer so that the air bubbles just start to enter the skimmer. Do not 

open the valve all the way. Replace collection cup

10. If after a 12 hour period of time there is not any organics collecting in the cup 

increase air volume by opening the air flow control valve by small increments 

until the unit begins to skim.

11. Replace the collection cup.

NOTE: it may take 24 hours for the skimmer to start to work. It will not start to 

foam/skim immediately.

 

tRoUBlESHootING

Problem: Nothing will collect in the collection cup. 
Solution: 

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There is not a biological load in the aquarium.

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 Verify the salinity is 1.020-1.025.

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 Make sure the water level control is in its highest position.

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 Decrease the amount of air by opening the air control valve. 

When making adjustments to the air intake wait a min. of 15-30 

minutes to see changes.

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 The variable venturi needs to be cleaned (2’ piece of airline 

tubing and 1 cup of warm water). Connect the airline tubing to the 

intake of the venturi place the other side in the warm water allow 

the venturi to suck the warm water through the intake.

• 

 It may take up to 24 hours for a Skimmer to start to work. Set up 

and wait without any adjustments.

• 

 The foam is unable to climb into the collection cup due to oils 

from your hands, lotions, tank additives and/or foods feed. Run 

carbon filter to remove any impurities.

• 

 Remove the collection cup and wash well with a mild detergent and rinse with 

hot water. Insure all the detergent is removed from the collection cup. Replace 

collection cup.

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 If the aquarium is new and there is not any live stock in the aquarium the 

skimmer will not skim.

Problem: only water is collecting in the collection cup. 
Solution: 

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The salinity is too high. Adjust salinity to 1.020-1.025.

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 The use of additives such as water conditioners, medications, red slime 

remover and/or use of synthetic sea salt are causing the bubbles to bond 

longer thus the water in the cup. As collection cup fills dump water and repeat 

until skimmer is working properly. The problem will persist until the agent 

causing the problem is removed.

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 Decrease water flow with the valve on the intake tube by 20%.

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 The aquarium was just cleaned and/or water change was done. As collection 

cup fills dump water and repeat until skimmer is working properly.

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 The rate of speed is too fast. Increase the amount of air by opening the air 

control valve, more air = less water flow 

• 

 Decrease the water level by lowering the water level control.

Problem: Small air bubbles are discharging back into the aquarium. 
Solution:

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 The filter pad is clogged or to soiled and water/air bubbles are escaping over 

the filter cartridge. Replace filter pad.

• 

 The salinity is too high. Adjust salinity to 1.020-1.025.

• 

 Decrease water flow with the valve on the intake tube by 20%.

• 

 The use of water conditioners (de-chlorinator, stress coats, algaecides and red 

slime removers) will increase the surface tension.

• 

 Connect a piece of airline tubing to the intake of the variable venturi and 

submerse the opposite end in the aquarium so the unit is just a power filter for 

24 hours and resume operation.

• 

 New tanks with the addition of uncured live rock will cause very poor water 

quality 20% of the water daily until water quality improves.

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 Once the skimmer is operating properly, you may choose to fine tune the air 

bubbles/skimmer, fine tuning the skimmer for the driest foam. 

 

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