Seachem Tidal 75 External Hang-on Filter

Power up your aquarium clarity with the Seachem Tidal 75. This HOB filter offers true self‑priming, a built‑in surface skimmer, adjustable flow and intake control, and a large cartridge‑free media basket that includes Seachem Matrix for instant biofiltration. The bottom‑to‑top flow path maximises media contact for cleaner, clearer water in aquariums up to 300 litres.

Key benefits

• Self‑priming start‑up with self‑cleaning impeller for reliable restarts after water changes or outages.

• Dual intake with surface skimmer removes biofilm and floating debris while improving oxygenation.

• Bottom‑to‑top flow path maximises media contact, reducing bypass and boosting filtration efficiency.

• Pop‑up maintenance alert indicates when cleaning is due; safe overflow routes water back to the tank.

• Large, removable basket fits your choice of media; generous capacity for sponge, ceramics, carbon, or resins.

• Adjustable flow plus telescoping intake to target different tank depths and fine‑tune circulation.

• Quiet operation with aerating return and a levelling foot for a stable fit.

Specifications

• Tank size: Up to 300 L (75 US gal), freshwater or marine.
• Flow rate: 1500 L/h (350 GPH), adjustable.
• Power: 7 W at 230 V/50 Hz (approx.); low running cost.
• Filter volume: Approx. 1.9 L media capacity.
• Dimensions (approx.): 25.5 × 17.8 × 24.2 cm; wall clearance ~8.5 cm.

What’s in the box

• Tidal 75 filter unit with self‑priming pump and surface skimmer
• Large removable media basket
• Foam/sponge for mechanical filtration
• Seachem Matrix bio‑media
• Levelling dial, telescoping intake, heater holder clip

How it works
Tidal 75 pulls water from both the surface and subsurface, then forces it bottom‑to‑top through mechanical and biological media before returning it to the tank. This increases contact time, improves oxygenation, and maintains stable, clear water with less bypass than typical back‑to‑front HOB filters.

Setup tips

• Rinse media; stage sponge below biomedia (e.g., Matrix/ceramics) so mechanical precedes biological filtration.
• Start at mid‑flow; adjust upward as livestock tolerate to balance circulation, plant movement, and noise.
• Extend the telescoping intake to target mid‑ or lower‑water debris; tune the skimmer to clear surface film in 24–48 hours.
• Clean the sponge in dechlorinated tank water; avoid over‑cleaning biomedia to preserve beneficial bacteria.

Ideal for

• Medium to larger planted tanks, cichlids or goldfish with moderate bioload, and marine fish‑only or quarantine systems up to 300 L
• Hobbyists wanting cartridge‑free flexibility, strong yet adjustable flow, and simplified maintenance cues

Why choose Tidal 75
Compared to cartridge‑based HOBs, Tidal’s large, configurable basket and bottom‑to‑top flow minimise bypass and let you fine‑tune media for your water chemistry and stocking. The visible service alert and safe overflow simplify upkeep, delivering dependable performance day‑to‑day.

All Tidal Filters come with Seachem's Matrix bio-media to get you started.

• Tank size: Up to 300 L (75 US gal), freshwater or marine.
• Flow rate: 1500 L/h (350 GPH), adjustable.
• Power: 7 W at 230 V/50 Hz (approx.); low running cost.
• Filter volume: Approx. 1.9 L media capacity.
• Dimensions (approx.): 25.5 × 17.8 × 24.2 cm; wall clearance ~8.5 cm.

• Lid turns into a tray for the media basket when doing maintenance
• Maintenance monitor alerts you when to clean filter
• The large capacity design of the filter basket allows for any type of Seachem filter media, which can be interchanged and placed in custom configurations.
• All Tidal Filters come with Seachem's Matrix bio-media and a foam filter to get you started.
• Adjustable leveling device
• Adjustable intake flow
• Self-priming pump & self-cleaning impeller
• Optional heater holder
• The surface skimmer will capture the water from just below the surface, where excreted fish oils accumulate, and deeper in the tank removing floating debris.
• Fully adjustable flow regulation adjusts performance to a specific aquarium volume, type, or provide an environment for fish which prefer more or less water movement or oxygenation.

• 1 x Seachem Tidal 75 Hang On Filter
• 1 x Instruction Manual
• 1 x Coarse Sponge
• 1 x Seachem Matrix Bio Media Package

So, you have just received your item and it is just might not be right for you.  No problem you can return your item and get a full refund or exchange of your item’s purchase price for up to 30 days*. Please note that the shipping cost will NOT be refunded.

Any product you return must be in the same condition you received it and in the original packaging. Please keep the receipt.

If your product fails within 60 days or arrives broken, we will repair or replace it. We have the right to get the product back to us or we can ask you to send a picture of the product with the power cord cut in half, so that we can supply you a replacement without the need to return the faulty product. We will pay for the return cost. We will issue you an RMA number, please place that on the product ready for return. Please note that we do NOT accept COD deliveries.

If your product fails outside the 60 days, we cover our products with a return to base warranty, where we will fix/replace the item.  We have great rates with our couriers, and we are more than happy to share these with you, just ask and we can get that organised for you.

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