Extreme Bluebolt

This is the dialled-in band for someone breeding for grade. The TOLERATED band is wider: pH 5.5–7.0, GH 3–7, KH 0–2, TDS 100–250 — but the higher the grade you are chasing, the more you want to sit inside the narrow band above. Taiwan Bee morphs (Blue Bolt, Wine Red, Shadow) should run lower still, at TDS 100–130 and GH 4–5. Ammonia and nitrite must be zero; keep nitrate under 10 ppm — half the ceiling you would accept for Neocaridina. Stability still beats perfection: a tank parked at GH 5 outperforms one chased between 4 and 7.

KH must sit at or near zero — and this is the part most people have backwards. Carbonate both raises pH and PINS it, so as long as there is KH in the water the soil cannot pull the tank down into the acid range. Worse: an active soil buffers by neutralising exactly that carbonate, so every degree of KH you add burns soil lifespan. In a Caridina tank THE SOIL IS THE BUFFER, NOT THE WATER. So mix RO water with a GH+ remineraliser only — never GH/KH+. The bonus: at around pH 6 almost all ammonia speciates to the far less toxic ammonium ion, NH₄⁺.

GH 4–6 is the calcium–magnesium window for moulting, and it is LOWER than Neocaridina (6–12) for osmoregulatory reasons, not because Bee shrimp are 'weak'. The wild animal lives in streams measured at just 33 µS/cm conductivity — barely above rainwater. Never chase a failed moult by pushing GH above 6: below GH 4 the shell cannot form, but above 6 it forms too thick and hard to shed. And if you must move GH, move it no more than 2 points per day.

What kills shrimp in warm water is not HEAT, it is OXYGEN. Going from 24 to 30°C, the water's oxygen-carrying capacity falls only about 10% (8.42 → 7.56 mg/L) — but the shrimp's demand, as an ectotherm, rises 50–100%. Two curves moving in opposite directions, and where they cross is where a colony dies. So: 24/7 AERATION is the single highest-value purchase for a Vietnamese Caridina keeper without a chiller — more valuable than premium food. Shrimp do not reliably surface-gasp the way fish do, so low oxygen stays invisible right up until you are counting bodies.

A very Vietnamese trap that few care sheets mention: cooling with a fan evaporates water, and minerals do NOT evaporate with it. After a few days of fan cooling your GH and TDS climb on their own while you have touched nothing — and shrimp die of failed moults rather than of heat. Top up evaporation with PURE RO, never with remineralised water. And raise aeration in hot weather, because warm water holds less oxygen.

The honest answer: to keep them ALIVE, no chiller is needed. To breed for GRADE, one is effectively required. Cooling fans buy you about 2–3°C in Vietnamese conditions (the 4–5°C figure often advertised is optimistic — high humidity blunts evaporative cooling), they must run on a temperature controller, and top-up must be 0-TDS RO or your TDS climbs daily. We recommend a chiller for high-grade PRL/PBL, Taiwan Bee, Blue Bolt, Shadow and for dedicated breeding tanks — we do not sell one to a beginner who simply wants a tank of A-grade Crystal Reds in Hanoi or Saigon. And to be clear about one myth: a deep substrate does NOT cool a tank.

Active buffering soil is mandatory, not optional. It is a cation-exchange clay: it releases H⁺ along with humic and fulvic acids, holds pH around 6.0–6.5 and strips KH out of the water. Never use an inert substrate — gravel or sand as you would for Neocaridina. Without buffering soil the pH drifts above 7 and breeding stops almost completely. Fresh soil leaches 2–8 ppm ammonia, so run the tank EMPTY for 4–8 weeks before adding shrimp; the extra time is not for the filter, it is for biofilm and microfauna to establish — which is what shrimplets actually eat. And do not deep-vacuum the soil: its exchange capacity is finite, and the mulm on top is food.

A free way to check whether your soil is still alive: measure the TDS of your MIXED water in the bucket, then measure the TDS IN the tank. A working soil always pulls the in-tank number below the mix. That gap is a live readout of the soil's remaining capacity. When the gap closes to zero and pH starts drifting past 6.8–7.0, the soil is finished — alongside GH creeping up on its own, unstable readings after every water change, deaths concentrated around moults, and granules that crumble to mud between your fingers. Realistic lifespan: about 12–18 months on RO, and possibly only 6 months on tap water (published figures range from 6 months to 3 years — the 12–18 month number is our own judgement).

Why is a Blue Bolt graded on DEPTH rather than pattern? Because the blue is not a blue pigment layer. Blue Bolt sits in the heavy-white position within the Taiwan Bee family — the same slot as Golden Bee / Snow White — and what you see is DARK BODY PIGMENT showing through a thin white covering layer. Wherever the white runs thin, the blue reads deep. That is also why a Blue Bolt never shows 'bands' the way a bee shrimp does: what it has is a gradient.

Stated plainly so nobody misleads you elsewhere: within the Blue Bolt group, only 'Extreme Blue Bolt' carries a meaning every vendor worldwide uses the same way — solid blue over the whole body, no white left. The words 'Deep Blue Bolt', by contrast, turn up with at least three different meanings across the major vendors: a deeper-than-usual blue, a separate strain name, or simply a marker for higher-priced imports. So we do NOT borrow the market's word — we publish our own definition in the table above and sell strictly to it. When you buy elsewhere, ask the seller plainly what they mean by 'Deep' and ask for the actual photograph of the batch.

One Taiwan Bee cross destroys a line permanently. Taiwan Bee (Blue Bolt, King Kong, Panda, Wine Red, Shadow) is not a grade — it is a homozygous RECESSIVE condition. What makes it dangerous: the F1 offspring of such a cross (called Mischlings) look like ordinary, slightly washed-out crystals while INVISIBLY carrying the allele. You cannot see it, and neither can the seller, until the F2 generation erupts in every direction and the pure line you spent years building is gone. No source documents a contaminated line ever being restored. So: a PRL/PBL tank is a dedicated tank — no other Caridina in it, not even 'just one'.

A Blue Bolt CANNOT hybridise with Neocaridina — different genus, and that is the only piece of good news in this section. It WILL cross with: tiger shrimp (Caridina mariae), the entire Crystal/Bee group, and every other Taiwan Bee colour class (Panda, King Kong, Wine Red, Blue Steel…). Which means the line you will read everywhere — 'Taiwan Bees can all live together' — is true only about SURVIVAL. As breeding advice it is the worst possible counsel: housing Blue Bolt with King Kong is the fastest way to have neither line left two generations later.

The 'white ring of death' — a white gap between carapace and abdomen where a shrimp cannot finish its moult — is untreatable and only preventable. It almost always follows a large water change or a GH swing. Below GH 4 the shell cannot form at all. So: change 10% weekly or 10–20% monthly, DRIP it in rather than pouring, and respect three limits — TDS moving no more than 10–25 ppm per day, GH no more than 2 points per day, temperature no more than 2–3°C per day. Top up evaporation with 0-TDS RO, never with remineralised water.

Something most sellers will not say out loud: the death that causes the most disputes does NOT happen at unboxing. Rehousing commonly triggers a moult, and if the receiving tank's GH is wrong that moult fails — the shrimp dies 24–72 hours later having looked perfectly fine on arrival. Which is why the receiving tank must be ready BEFORE you order, not prepared on the day. Bee shrimp also travel less well than Neocaridina: a safe window of 18–24 hours in an air-filled bag and 36–48 hours on pure oxygen, against 24–36 and 48–72 for Neocaridina. We stop feeding 24–48 hours before packing — the single most effective way to limit ammonia in the bag.

Feed 2–3 times a WEEK, not daily, with 1–2 deliberate fasting days. Portion: a fingernail-sized pinch per 10–20 shrimp, cleared within 2–3 hours — anything left at 4 hours comes out and the next portion goes down. Overfeeding is the number one cause of death: it produces ammonia, drives bacterial blooms that crash oxygen, and feeds planaria, hydra and Vorticella. Put another way, planaria and hydra are not bad luck — they are a readout of surplus food. If they appear, cut feeding before reaching for chemicals. Rotate foods: shrimp pellets, blanched vegetables (courgette, kale), dried catappa leaves — variety matters more than the protein percentage on the label. Bacteria powders such as Bacter AE must be dosed at 1/8 to 1/2 of the label amount, 2–3 times a week: the manufacturer's dose causes bacterial blooms and oxygen crashes.

With Taiwan Bees, overfeeding is the single most common cause of a wipe-out — ahead of temperature. Uneaten food rotting in the substrate degrades the very soil the tank depends on to hold pH, and a bacterial bloom follows. The healthiest colony is a slightly hungry one with plenty of biofilm to graze.

Dissolved copper kills shrimp at very low concentrations. The real culprits: copper-based fish medications (a fish dose runs 2–3× the shrimp-lethal level), snail treatments, concentrated micro fertilisers, copper plumbing and pesticide-treated plants. Dietary copper, by contrast, is essential — roughly 40% of a shrimp's body copper sits in haemocyanin, the molecule that carries oxygen in its blood. Needed from food, not from water.