Combining eSHa 2000, EXIT and gdex: What to Check

Which combinations are documented?

eSHa’s current product pages explicitly describe combining 2000 with EXIT, and 2000 with gdex. For those named combinations, the manufacturer says doses do not need to be halved merely because the products are used together.

That does not turn every possible combination into a standard protocol. Before using all three together, check the leaflets supplied with the exact bottles or ask eSHa to confirm the combination and schedules. This page does not prescribe an automatic three-product treatment for every new fish or mixed set of symptoms.

Different products, different jobs

• eSHa 2000: the manufacturer describes a freshwater treatment for fungal infections, bacterial skin infections and certain skin/gill parasites.
• EXIT: the manufacturer markets it for freshwater white spot and velvet. Its warnings include possible staining of silicone.
• gdex: the manufacturer identifies skin and gill flukes and tapeworms as targets, and currently describes a five-day treatment plan.

Rubbing, spots, heavy breathing or damaged fins are observations to record, not proof that three medicines are required. Note water-test results, affected species, when symptoms started and what has already been added before deciding on treatment.

Do not turn the three schedules into one

The current product information describes a standard three-day course for 2000 and EXIT; gdex has a five-day plan. “Five-day plan” does not mean adding the same amount on five consecutive days. Follow each day in the relevant leaflet, including days without a dose or with a water change.

The earlier article’s generic “standard doses of all three for three days” has been removed. It also incorrectly reduced the first-day 2000 instruction to a universal double dose. Use the printed quantities instead of a shortcut.

Equipment and water changes

eSHa instructs users to keep ordinary non-adsorbing filtration running while removing or switching off the chemical media and equipment named for the product, such as activated carbon and UV. gdex guidance also names protein skimmers. A UV unit is not the same as the aquarium’s ordinary viewing lights; the former article’s universal three-day blackout instruction has been removed.

A water change removes some dissolved medication. Do not automatically add another full-tank dose after every change. Follow the relevant leaflet’s replacement-dose and treatment instructions; check the interaction of water conditioners with the medicines before proceeding.

For example, removing 20% of a well-mixed solution leaves 80% of the dissolved material present immediately beforehand. This accounting example does not establish how much active medication remains after breakdown or whether another dose is due.

Shrimp, snails and other livestock

eSHa’s 2000 guidance cautions about shrimp and about dead snails or algae being eaten during treatment. The current EXIT page describes use with shrimp and snails, while gdex information describes tolerance by a range of shrimp. Check the manufacturer’s compatibility information for all livestock and every product involved; individual-product tolerance does not establish safety of a combined course.

The earlier advice to replace a three-product mix with EXIT plus gdex whenever shrimp are present has been removed. Compatibility is not a reason to administer a medicine that has not been established as appropriate.

Extensions and quarantine are separate decisions

EXIT’s extension guidance depends on the response during the initial course. It is not permission to extend all three products together. We have removed the fixed day-four water-change rule, automatic “import quarantine” extension and mandatory post-treatment supplement recommendation. Consult the exact product instructions when treatment fails or symptoms change.

Quarantining an apparently healthy newcomer is also different from treating a visibly ill fish. eSHa publishes a separate quarantine sequence in its FAQ. Do not substitute this article’s former three-day “cocktail” for that sequence.

Sources and further reading

• eSHa 2000: product instructions and FAQs
• EXIT: product instructions, extensions and warnings
• gdex: treatment plan, equipment guidance and calculator
• eSHa: general FAQ and quarantine sequence
• Our volume estimates, US gallons and rounding rules

Manufacturer web information is general guidance and is not a replacement for the supplied leaflet. The earlier “Gold Standard” assurance, personal rescue story and claims of guaranteed protection have been removed; this page does not substantiate them.