APT Sky

Grow Anything

Enjoy the freedom to breed shrimps in softwater tanks, and have hardwater and softwater plants thrive side-by-side.

Playtime

Plants have conflicting softwater / hardwater requirements.

APT SKY removes the hassle of having to choose between softwater and hardwater plants. For softwater tanks, it boosts shrimp health and reproduction.

The catch? It does require Softwater or Reverse Osmosis (RO) water to begin with. At the moment, there is no easy way to make Hardwater ’Soft’.
Precision Matters

Conventional ‘RO remineralisers’ raise GH but almost all inadvertently alter NPK values.

Most add an excessive amount of Potassium, for example. This in turn interferes with optimal fertilisation.

APY SKY adds Calcium, Magnesium, trace minerals and natural seaweed extract, in a way that uniquely leaves NPK intact.

Smart Savings

As a GH booster, APT SKY is ~ 3X as concentrated as conventional remineralisers. Each 3.5g / 5ml per 60L adds 12ppm Calcium and 3.5ppm Magnesiumm, raising GH by 2.5 dGH.
Did we mention that it is super-soluble, non-caking and just a joy to handle?

Using APT Sky in Singapore Soft-Water and Shrimp Tanks

In Singapore, our tap supply is generally soft and slightly acidic, but it is also chloraminated, so most local keepers run it through an RO unit before remineralising for sensitive Caridina and breeding colonies. APT Sky is built exactly for this workflow: you start from pure RO water and dial in calcium, magnesium and trace minerals to a predictable target. We find it especially handy in HDB and condo fishrooms where consistent, repeatable water is hard to maintain across many small tanks.

Because it leaves nitrogen, phosphorus and potassium untouched, you keep full control of your plant fertilisation separately, which matters in a high-tech scape. For shrimp keepers, a stable general hardness supports moulting and breeding far better than swinging parameters from inconsistent top-ups. We suggest mixing in a dosing container, letting it dissolve fully, then checking GH with a kit before adding livestock, rather than dosing straight into a populated tank.

Stop by our conditioners and medication range to pair it with a buffer if you keep crystal shrimp. For the full method, read our guides on remineralising RO water and the best GH boosters for shrimp.