If you are using reverse-osmosis (RO / RODI) water, it is important to replenish the minerals removed as part of the RO process. APT SKY is simply the best remineraliser. It is powerful (and therefore economical), uniquely comprehensive, and does not negatively alter macro nutrients, KH and pH.
If you are not using an RO/ RODI system because you are lucky enough to have stable softwater, and have a nature-style aquarium ( a mix of plants, hardscape and fish), APT SKY expands your playground to popular species like Rotala macrandra which require higher levels of magnesium than what is commonly found in softwater regions.
If you are not using an RO/ RODI system because you are lucky enough to have stable softwater, and plan to keep shrimps, APT SKY is a great booster for shrimp health and reproduction, due to the Calcium and other minerals it provides. Note: Shrimps are bred in varying water parameters. Always try match the shrimp's 'home' parameters (i.e the farm or place where they were bred).
Each 3.5g / 5ml ( 1 scoop) adds 12ppm Calcium and 3.5ppm Magnesium and raises GH by 2.5 dGH in 60L of water.
We recommend a target of 5-7 dGH. Use the SKY Dosing Calculator below.
This is because TDS readings can vary considerably. A high reading is not necessarily good, and a low reading is not always insufficient. For example, 100pm of Calcium in water (high TDS) is relatively harmless while 5ppm of copper (low TDS) will kill most aquatic life.
TDS, or "Total Dissolved Solids" simply measures all dissolved organic & inorganic substances in the water. However, it does not tell us WHAT is in the water. What makes up the TDS value is alot more important than the aggregate reading.
Then why do people measure TDS?
TDS is very useful as a relative test.
It is like a thermometer.
It is useful to check if it rises or falls over time, as the cause may be consequential.
If your room temperature rises sharply, may be a sign of a breakdown in ventilation or clogged air conditioning. It may came from the window being left closed or open. It may result from the automatic blinds failing to work. It may be because of an overheated computer in the room.
As a relative test, TDS is useful when adding new hardscape or other materials to the tank. If TDS rises over time, it means that some part of the rock is dissolving. Totally inert rock will not change the TDS value.
Read more about TDS here.
We cover many popular plants on our website, so this is a good place to start. APT SKY removes the need for guesswork. If you have low KH to start with, APT SKY optimizes water parameters for both softwater and hardwater plants. If you have hardwater (above 2dKH), an RO/RODI system makes plant growing alot easier as the majority of tropical aquatic plants prefer softer water.
They do different things. It is always important to fit plants to their preferred water parameters. It is much harder to grow Rotala macrandra in hardwater for example. They won't die, but will struggle to display good form or coloration. Better nutrition in the form of fertilisers cannot compensate for mismatched water parameters.
Basically, if you have GH below 7 dGH, you can use APT SKY to raise GH to the recommended ~7 dGH zone.