Best GH Boosters for Shrimp Tanks
Shrimp are far more sensitive to mineral content than most fish, and getting your general hardness right is non-negotiable for healthy moults, breeding, and survival. Finding the best GH booster shrimp aquarium keepers can rely on is one of the first decisions every serious shrimp hobbyist faces. This guide from Gensou Aquascaping in Singapore compares popular remineralisers and explains how to dose them correctly for both Caridina and Neocaridina species.
Why GH Matters for Shrimp
General hardness measures dissolved calcium and magnesium — the minerals shrimp need to build and harden their exoskeletons after each moult. Too low and shrimp suffer failed moults, a leading cause of death. Too high and osmotic stress becomes an issue, particularly for soft-water Caridina species like crystal reds and Taiwan bees. Singapore’s PUB tap water sits at GH 2-4, which is too soft for most shrimp without supplementation. RO or distilled water starts at GH 0 and requires full remineralisation.
Salty Shrimp GH+
Salty Shrimp GH+ is the gold standard for Caridina tanks. It adds calcium, magnesium, and essential trace minerals without raising KH, keeping the water soft and acidic — exactly what crystal red shrimp, Taiwan bees, and other Caridina varieties demand. One level scoop raises approximately 20 litres of RO water to GH 6. In Singapore, a 230 g tub costs $25-35 on Shopee or Lazada and lasts months for a typical nano tank. Dissolve it in your water change bucket before adding to the tank.
Salty Shrimp GH/KH+
For Neocaridina shrimp — cherry shrimp, blue dreams, yellow neons — a product that raises both GH and KH provides the harder, more alkaline water these species prefer. Salty Shrimp GH/KH+ is the companion product, targeting GH 7-8 and KH 3-4 in a single dose. It is the simplest option for beginners keeping Neocaridina in remineralised water, ensuring stable pH and adequate mineral content in one step.
SL-Aqua GH Conditioner
SL-Aqua, a Taiwanese brand popular in Southeast Asia, offers a liquid GH conditioner that many Singaporean shrimp keepers favour for its convenience. No pre-mixing required — add drops directly to the tank or water change bucket. It raises GH without affecting KH, making it another solid choice for Caridina setups. Pricing is comparable to Salty Shrimp at around $18-28 per bottle, available at local shrimp-focused shops and online.
DIY Mineral Mixes
Advanced hobbyists sometimes mix their own GH booster using calcium chloride (CaCl2) and magnesium sulphate (MgSO4, commonly sold as Epsom salt). A 3:1 ratio of calcium to magnesium by weight approximates the mineral balance shrimp need. While significantly cheaper per dose — the raw chemicals cost under $10 for enough to last a year — this approach requires accurate scales, careful calculation, and testing after every batch. It suits experienced keepers comfortable with water chemistry but is not recommended for beginners.
Dosing and Target Parameters
For Caridina species (crystal red, Taiwan bee, shadow bee), target GH 4-6 with KH 0-1 and TDS 100-150. For Neocaridina species (cherry, blue velvet, green jade), aim for GH 6-8, KH 2-4, and TDS 150-250. Always add the remineraliser to your water change bucket, stir until dissolved, and test with a GH test kit before pouring the water into the tank. Sudden GH swings stress shrimp, so consistency between water changes is more important than hitting a perfect number.
Common Mistakes to Avoid
Never dose a GH booster directly into the tank — uneven distribution can create localised mineral spikes that trigger moulting problems. Do not assume your TDS meter is a substitute for a GH test; TDS measures all dissolved solids, including fertilisers and organics, not just calcium and magnesium. Replace your GH test reagent annually, as expired kits give inaccurate readings. Finally, remember that aquasoil absorbs minerals over time, so newly set-up tanks may require slightly higher initial dosing until the substrate stabilises. Choose the best GH booster for your shrimp species, dose it consistently, and moulting problems become a rarity rather than a constant worry.
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emilynakatani
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