IceCap Gravity ATO

The IceCap Gravity ATO tops off evaporated water using zero electricity — a simple pressure-differential design where water flows from an elevated bottle into the tank automatically once the water level drops below a short intake tube.

• Power required: none — works entirely on gravity and pressure difference
• Includes: Gravity ATO base, 3 mounting inserts for different rim thicknesses, 500ml bottle, silicone tubing

Setup: pick the mounting insert that matches your tank's rim thickness, cut the long and short tubes to length (both cut at a slant), insert them into the base, thread on the bottle, and mount it to the rim. Adjust so both tubes sit in the water — when the level drops below the short tube, the bottle automatically releases water until it's covered again.

Best for: nano tanks, backup/travel top-off, or anywhere a powered ATO isn't practical or you want a power-outage-proof backup.

Compatible replacement parts: mounting inserts and silicone tubing for the Gravity ATO.

At Marine Concept Supply, all sales are final. Due to the sensitive nature of live animals and aquatic products, we do not accept returns or exchanges under any circumstances. Please review your order carefully before completing your purchase. No Cancellations.

If you have any questions or concerns about your order, please contact us at shop@marineconceptsupply.com and we’ll do our best to assist you.

We Ship UPS and will send tracking as soon as the item ships. 

Return shipping for any approved warranties are not covered and will be subtracted from the approved credit total.

Restock Fees apply to some products, due to their size or a manufacturer policy.Each product with a restock charge is marked online, in the description.

Please inspect your order upon reception and contact us immediately if the item is defective, damaged or if you receive the wrong item, so that we can evaluate the issue and make it right