# Zeus tank e-liquid, which bottle suits Geekvape's sub-ohm tank > Which e-liquid suits a Geekvape Zeus tank, at least 70 per cent VG, how nic shots shift the blend, strength, nic salts and flavour, read from the bottle. In vape shops, the **Zeus tank** is Geekvape's sub-ohm tank, and product pages dwell on its airflow, its diameter and its coils. The e-liquid gets a single line, often at the bottom of the page. Yet the liquid is the first setting on this kind of tank, ahead of wattage. Pick the wrong bottle and the coil either runs dry or floods. The question is what the label needs to show for this tank. ## Zeus tank e-liquid, Geekvape's sub-ohm tank and what it takes A **Zeus tank** is Geekvape's Zeus sub-ohm tank, a 26 mm top-fill tank sold in the UK in its 2 ml version and fitted with 0.2 and 0.4 Ω Z coils. It needs a liquid rich in vegetable glycerine. Two retailers, one French and one British, recommend at least 70 per cent VG for its Z coils, which means a PG/VG ratio of 30/70 or thicker. The reason lies in the coil values. With a 0.2 Ω coil rated at 70 to 80 W, the wick heats a lot of liquid with every puff, and a thinner blend risks flooding it. Nicotine strength comes next, within the 20 mg/ml cap that applies to every nicotine e-liquid sold in the UK. The form of nicotine and the flavour come last. ## The Zeus versions to identify before choosing a bottle The Zeus name covers several generations and several families at Geekvape, and they do not all take the same liquid. Before reading the bottle, it helps to know which tank you have. ### The original Zeus Sub-Ohm The first Zeus Sub-Ohm is 26 mm wide, fills from the top and holds 5 ml in its standard version, according to several retailers. It ships with a pre-installed 0.2 Ω Z2 coil rated at 70 to 80 W, plus a 0.4 Ω Z1. In the UK, refillable tanks are capped at 2 ml, so this tank is sold in its 2 ml TPD version, with the capacity printed on the box. ### The Z Subohm 5 and the Z family The Z Subohm 5, which some retailers also list as the Zeus Sub-Ohm Tank 5, moves up to 29 mm. It takes Z XM coils, 0.2 Ω at 70 to 80 W and 0.4 Ω at 50 to 60 W, and a British retailer describes it as a direct-lung tank calling for at least 70 per cent VG. The same Z coils fit other sub-ohm tanks from the brand. The ratio guidance therefore applies to the whole family, whichever tank carries the coil. ### The Zeus tanks this article does not cover The Z Nano, fitted with B coils, and the Zeus Max, fitted with M coils, do not use Z coils. Their own product pages give their own liquid guidance, to be read separately. ## Reading the ratio on a bottle meant for a Zeus tank The ratio is the figure that decides everything for this tank. It is printed on the front label, but not always in the same order, and that is where most misreadings happen. ### Check the order of the two numbers Many labels show PG/VG, with propylene glycol first. A 30/70 then holds 30 per cent PG and 70 per cent VG, the minimum for this tank. Some brands reverse the order or show only the VG share, so look for the letters next to the numbers. When in doubt, the ingredients list settles it, as our [guide to reading an e-liquid bottle](/uk/vape-liquid-label-guide/) explains. Ingredients are listed by descending weight, and VG, being denser, comes first as soon as the blend holds as much of it as PG. ### One flavour, two ratios Several makers offer the same flavour in a thin version for pods and a high-VG version for sub-ohm tanks. The bottle covered in our [Alfaliquid Ice Rocket review](/uk/alfaliquid-ice-rocket-review/) is one example, sold in two ratios depending on the coil. For the Zeus, only the thick version fits. ## Shortfills and nic shots, the sum that drops you below 70 per cent High-VG liquids are often sold as nicotine-free shortfills, to be topped up with 10 ml nic shots. The shot adds nicotine, but it also brings its own ratio, which dilutes that of the shortfill. Take a 50 ml shortfill in 30/70 topped up with one 10 ml, 18 mg/ml nic shot in 50/50. The blend holds 15 + 5 = 20 ml of PG out of 60 ml, so 33 per cent PG and 67 per cent VG, at a strength of 3 mg/ml. With two shots, the VG share falls to 64 per cent. Either way, the liquid ends up below the level retailers recommend. The same sum with a 20/80 shortfill gives 75 per cent VG with one shot and 71 per cent with two, so the threshold holds. A higher-VG nic shot, where the brand offers one, has the same effect, for instance 75 per cent VG with a 0/100 shot in a 50 ml 30/70 shortfill. The full method, from the space left in the bottle to the number of shots, is set out in our piece on [100ml e-liquid and nic shots](/uk/100ml-e-liquid-nicotine-shots/). For this tank, just one question is added, the final ratio. ## Strength, nic salts and the 2 ml tank Once the ratio checks out, the rest of the front label is read in light of the wattage. A 0.2 Ω coil vaporises far more liquid per puff than a pod, which changes what the same figure means. ### Strength in mg/ml Strength tells you how much nicotine there is per millilitre of liquid, not per puff. At 70 W each puff vaporises much more liquid than at 15 W, so a strength that feels comfortable in a pod gives a very harsh vapour in a Zeus tank. A low strength therefore suits this kind of tank better. ### Nic salts or freebase The nicotine form is shown on the front label or in the product name. If a nic salt bottle shows less than 70 per cent VG, it is that ratio that rules it out for this tank, not the form of nicotine. The same reading rule applies to every bottle. ### Capacity and filling A 2 ml TPD tank fills quickly, and the bottle's calibrated nozzle has to fit the top fill port. High-VG liquids flow slowly, so give the liquid time to settle before closing the top cap, to avoid overfilling the tank. ## Flavour and Z coil wear Flavour does not affect compatibility, but it does affect coil life. A very sweet recipe usually gunks up the wick faster than a fruit or menthol one, especially at high wattage. A caramelised note that lingers in every puff is the sign of a gunked wick that needs replacing. Switching liquid without switching coil also mixes flavours for several tankfuls, which is why some vapers keep one coil per flavour family when they alternate. ## FAQ These five questions come up when choosing a bottle for this tank. The answers stick to what the label and retailer pages let you check. ### Can I use a 50/50 in a Zeus tank? It is not the ratio retailers recommend, as they ask for at least 70 per cent VG. A thinner 50/50 risks flooding the wick and spitting, especially with the 0.2 Ω coil. ### Does a 100 per cent VG liquid work? Retailers set a VG minimum, not a maximum. A very thick liquid does take longer to soak the cotton, though, and a puff taken too soon after filling can taste burnt. ### Should a new Z coil be primed? Yes. A few drops on the exposed cotton, then a full tank left to sit for a few minutes, avoid firing a dry wick. Starting below the rated range and stepping up gradually also spares the coil. ### Does a nic salt shot change the ratio of the blend? A nic shot shifts the ratio according to its own PG/VG split, whether it holds nic salts or freebase. That figure is what matters for this tank, and it appears on the shot's label as on any nicotine bottle. ### How long should an opened bottle for this tank be kept? That depends on the bottle and how it is stored, not on the tank. Our guide on [how to store e-liquid](/uk/how-to-store-e-liquid/) covers what to check depending on whether the bottle is sealed, opened or topped up with nic shots. ## Zeus tank, read the ratio before setting the wattage For a Zeus tank running Z coils, the bottle is chosen first on its ratio, at least 70 per cent VG, checking what nic shots do to a shortfill. Strength, nicotine form and flavour follow. The same habit applies to any sub-ohm tank on the shelf. With a **Zeus tank**, a label read in the right order heads off most spitting and burnt hits before the mod is even set. ## On the same shelf - [Choosing vape liquid by reading the bottle](/uk/vape-liquid-label-guide/) - [100ml e-liquid and nic shots, the maths the bottle allows](/uk/100ml-e-liquid-nicotine-shots/) - [Alfaliquid Ice Rocket review, the 10ml bottle read closely](/uk/alfaliquid-ice-rocket-review/) La Fiole Bleue publishes editorial content for adult readers only. Vaping products may contain nicotine, a substance that causes dependence, and vaping products are not for sale to anyone under 18 in the UK. This article describes bottles and is not a buying recommendation.