10 Best Aquarium Auto Top Off

Updated on: June 2021

Best Aquarium Auto Top Off in 2021


XP Aqua Duetto Dual-Sensor Complete Aquarium Auto Top Off ATO

XP Aqua Duetto Dual-Sensor Complete Aquarium Auto Top Off ATO
BESTSELLER NO. 1 in 2021

XP Aqua Ultimate ATO - Complete 4-Sensor Aquarium Auto-Top-Off System

XP Aqua Ultimate ATO - Complete 4-Sensor Aquarium Auto-Top-Off System
BESTSELLER NO. 2 in 2021

Marine Color 2.5 Gallon Auto Top Off Container for Aquarium Reef Tank Reservoir

Marine Color 2.5 Gallon Auto Top Off Container for Aquarium Reef Tank Reservoir
BESTSELLER NO. 3 in 2021
  • 2.5 Gallon Auto Top Off Container for Aquarium Reef Tank reservoir
  • crystal clear PC with an elegant top, to hold top off water for your aquarium in a closed container.
  • The Trigger Systems ATO containers have a removable lid to prevent excess evaporation, while providing a large opening to refill and clean the reservoir as needed.
  • Each ATO reservoir has two 0.25” OD holes for tubes to be plumbed through, or wires for float switches.
  • Can be used as dosing conteiner.

XP Aqua Sumpless ATO - Complete Aquarium Auto-Top-Off System for Sumpless Aquariums

XP Aqua Sumpless ATO - Complete Aquarium Auto-Top-Off System for Sumpless Aquariums
BESTSELLER NO. 4 in 2021

WuyouChy Auto Top Off Water Filler Aquarium Mini ATO System Fish Tortoise Tank Water Level Controller No Wiring Float Valve

WuyouChy Auto Top Off Water Filler Aquarium Mini ATO System Fish Tortoise Tank Water Level Controller No Wiring Float Valve
BESTSELLER NO. 5 in 2021
  • When you are on a business trip or traveling, use our water compensator to avoid water shortage in your fish tank, aquarium tank, tortoise tank, or other tanks.
  • Better than a float valve, no wiring or power required, takes less space.
  • Easy to use, practical and interesting. Just screw the compensator to a water bottle, then stick it to the tank.
  • When the water level drops to reveal the shorter tube, the water in the bottle automatically flows into the tank due to pressure difference.
  • Each compensator comes with 3 replaceable slots, suitable for 4 kinds of tank thickness: 4mm, 6mm, 8mm, and 10mm. For other thickness, you need to prepare extra gasket.

Hydor Smart Level Controller, Automatic Top Off, ATO

Hydor Smart Level Controller, Automatic Top Off, ATO
BESTSELLER NO. 6 in 2021
  • Low Voltage And Fully Electronic. 6.5' Sensor Cord.
  • Dual Alarm With Light And Sound To Alert Any Malfunctioning
  • Magnet-suction cup support mount for sensor, also includes cable clamp for cord
  • Insensitive To Surface Movements Of The Waves
  • Versitile. Can Be Used For Any Size Aquarium Or Sump. Adjustable Flow Rate Supply Pump Sold Seperately. Kindly refer user manual and instruction video for reference.

AutoAQUA Smart ATO Lite SATO-260P Automatic Top Off System Water Filler Refiller Water Level Controller w/Pump (SATO-260P)

AutoAQUA Smart ATO Lite SATO-260P Automatic Top Off System Water Filler Refiller Water Level Controller w/Pump (SATO-260P)
BESTSELLER NO. 7 in 2021
  • Extremely easy to install with integrated magnetic mount
  • No moving parts to fail
  • Dual-optical level sensor in one pack provides dual protection
  • QST (Quick Security Technology) provides real-time failsafe protection against failure
  • LED light alert, Everything needed is included

Tunze USA 3155.000 Automatic Top Off Osmolator for Aquariums

Tunze USA 3155.000 Automatic Top Off Osmolator for Aquariums
BESTSELLER NO. 8 in 2021
  • Redundancy for absolute safety
  • Nearly 30 years as the number one auto top off system
  • Easy installation with magnetic holders

DIGITEN Auto Top Off System, Fish Tank Sump Water Filler Refiller, Automatic ATO System for Aquarium with Pump

DIGITEN Auto Top Off System, Fish Tank Sump Water Filler Refiller, Automatic ATO System for Aquarium with Pump
BESTSELLER NO. 9 in 2021
  • ◕‿ ◕Simple, complete, Smart Automatic Top Off System, aquarium automatic water supply system, super easy installation and maintenance. Suitable for aquariums up to 5/8"(16mm) thick, durable PC material holder to prevent move, adjustable bracket on holder make different water levels possible.
  • ◕‿ ◕Precise dual float water level sensor for overfilling protection. When the water goes below the minimum water level , the power will be activated, the pump automatically works, and cut off once the water level reach to maximum. The second float ball will work when the first float ball fails.
  • ◕‿ ◕Siphon break. The siphon break is optional installation part. It is recommended that the water level of display tank be higher than the reservoir, and DON’T leave the end of the water supply pipe in the water, otherwise, it will siphon after the pump shuts off, if so the siphon break must be installed at the end of the water supply pipe.
  • ◕‿ ◕Plug-and-Play with all parts included. Everything you need is included, it will also come with a pump and a ETL listed power adapter. Safely keep sump water levels stable, no moving parts that can fail.
  • ◕‿ ◕Suitable for all kinds of fish tanks, aquariums, sumps, etc. Suitable for aquariums up to 5/8"(16mm) thick, save you a lot of time to enjoy your life. The Smart ATO Complete Kit will never make water overflow your tank, it is especially suitable for the sump with a lot of evaporation. 12 month warranty!

ZAOJIAO Auto-top-Off ATO Solution Auto Water Filler Adjustable Float Valve Mounting for Aquarium Sump

ZAOJIAO Auto-top-Off ATO Solution Auto Water Filler Adjustable Float Valve Mounting for Aquarium Sump
BESTSELLER NO. 10 in 2021
  • The ATO system is easy to hang on to your aquarium sump.
  • It is suitable for 5 to 18mm thickness of aquarium.
  • Pressure: 0.02-0.8MPa.
  • Material: Polyethylene Plastic and Acrylic.
  • The range of Water level from aqurium sump top is 0-25mm or 0-10".

Juggling Nutrient Levels for an Optimal Reef Aquarium

Walking on a tightrope is a good illustration of how difficult and time consuming it may be for avid aquarists to balance out the right amount of nutrients, thus providing a thriving and well maintained aquarium.

As is the case with many living animals in a marine environment, their is a dividing line between feeding too much and just right. What may be ideal for one particular species of coral enabling it to thrive may not be advantageous for another. A great example of this is Xenia, which is a species of soft coral. Xenia thrives under conditions where nutrient levels are higher than would be for standard reefs of the world. The addition of carbon and very limited dissolved organics and other nutrients normally causes reduced growth, On the contrary, a hermatypic coral such as Montipora Digitata favors limited nutrient water or even nutrient deprived water parameters as they receive most of the nutrients required by them in the form of light which their host zooxanthellae provides as a result of photosynthesis.

Trying to limit the amount of phosphates, silicates, nitrates and other forms of nitrogen will, often times, be the determining factor as to whether or not and how much algae growth you have in your tank. Diatoms, cyanobacteria, hair and bubble algae and other forms of microalgae can be determined by the amount of nutrients in your water. Depending on the amount of corals as well as the types of corals as well, you may or may not want to deplete nutrients from your water totally. Many filter feeding animals such as Tridacna Clams, fan worms, copopods, polychaete worms, amphipods, gorgonians and sponges rely on dissolved nutrients for their success. Many forms of corals also absorb and adsorb nutrients through their outer tissue layer for their growth and survival. Octocorals are mainly the ones that benefit from higher than normal nutrient levels.

If you plan on or are maintaining hermatypic corals such as Montipora, Acropora and many other small polyped stony corals, then you will want to have pristine, nutrient poor water. Limiting factors such as feeding amounts and how many times a day and fish bioload will help to reduce nutrient levels from elevating. Efficient and effective skimming and other forms of filtration, water changes, clean up crew hosts and housing macroalgae and sea grasses will also help to reduce nutrient levels and decrease microalgae and other unsightly conditions from imploding by feeding and competing for nutrients that would normally be consumed by nuisance algae.

Your best bet is to decide which side of the fence you would be best on based on the corals you possess and/or plan on purchasing in the future. I can say for myself that with a large assortment of filter feeders and octocorals, maintaining a higher than normal nutrient level in my tank such as a 10-ppm nitrate level, my tank is thriving. My Xenia, Discosoma mushrooms and Kenyon Tree corals are growing like weeds and with limited nuisance algae growth. With a fine balance of feeding, filtration and bioload of fish, invertebrates and corals in a closed system environment combined with the myriad of other aspects, essential in creating and maintaining a successful and thriving marine aquarium, you will not be disappointed.

Reefs are characteristic of two distinct biotopes. Those that are surrounded by nutrient poor waters such as fore-reef slopes and lagoons and those that have a surplus of nutrients such as upwelling reef areas and tidal zones. Coral reefs are a complex ecosystem comprised of both primary producers (ie. phytoplankton, zooplankton and algae) as well as consumers (ie. fish, invertebrates). Food and nutrients are vital to life, reproduction and growth of all living animals. Food provides energy and for the energy requirements to be met, total energy demand must be met. This may come in the form of heterotrophic modes of feeding or autotrophic modes. Corals that are not reliant on zooxanthellae and light for that matter are assumed to be heterotrophic and will need to be fed-target feeding being the best method for these corals to survive through ideal nutrition,

On the other side of the field are the corals that need to be fed, preferably though strong and intense light to help generate the surplus of nutrients required by zooxanthellae to expand further up line to the corals hosting zooxanthellae, are termed autotrophic. Being able to handle your divers population successfully by offering them what they need to satisfy the energy and nutritional needs of corals is when you will be able to sufficiently and accurately satisfy your livestock without polluting you water causing nuisance algae outbreaks and depreciate growth and reproduction rates.

You by no means want to deprive nor neglect the food requirements needed by the various livestock to live a healthy life, just to create that fine line that will award you and you livestock an enjoyable and thriving closed system environment.

The overall key to an awesome looking and enjoyable tank filled with a plethora of living animals can be obtained by finding the fine line between food input and export/assimilation to ensure the dissolved nutrient level remains low enough to support all forms of live.

Starving your tank is the wrong answer in creating a nutrient poor aquarium, if that is what your ultimate goal is to be. Instead, by providing ample amounts of live sand and rock as well as water changes and efficient mechanical filtration, combined with the filter feeders, detritivores and various bacteria to handle the aerobic, anaerobic and anoxic areas of the benthic zone of your tank. Proper testing will also help you to closely monitor nitrates, phosphates, silicates and other common nutrient components before they become a major disaster.

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