BETTA TANK(6X6X6 INCH ) Polished Edge finish

The same 6×6×6 inch glass cube tank as the basic version, but built with a polished ("good"/smooth) edge finish rather than a plain cut edge — the glass edges are ground smooth rather than left sharp, which is both safer to handle and neater looking. At 15.2cm per side, it holds roughly 3.5 litres of glass volume before substrate and decor. It's the small step up in this site's betta-tank range for buyers who'd rather pay a bit more for the nicer finish than opt for the plainer basic-finish version at the lower price point, without any change in the tank's actual capacity or footprint.

Functionally it's the same style of tank as the basic-finish version: flat glued glass panels rather than a curved bowl, giving a distortion-free view and room to add small equipment if you want it.

The polish is purely on the outward-facing edges of the glass panels, not a coating or treatment applied to the whole tank — it makes a genuine practical difference during setup and cleaning, since a raw cut glass edge can be sharp enough to nick a hand during a water change or when reaching in to adjust decor, while a polished edge is noticeably smoother and safer to handle.

At roughly 3.5 litres, this is sized for exactly one small fish — a betta is the natural fit, being adapted to shallow, still water and able to breathe air at the surface. It's not sized for a group of fish or anything needing real swimming room, and a second betta must never be added regardless of sex, since they will fight in an undivided space this small.

It ships as bare glass with no filter, heater, or light — decide upfront whether to run it fully bare (more frequent manual water changes) or add a tiny sponge filter and/or a low-wattage nano heater for more stable conditions.

The polished edges make it a little more pleasant to handle during cleaning and setup, but don't change any of the underlying husbandry requirements versus the basic-finish version.

Rinse with plain water before first use (no soap or detergent), fill with dechlorinated water, and let it reach room temperature before adding the fish. If adding any equipment, run it empty for a day or two first to confirm everything is working as expected before the tank has a fish in it.

Place on a level, stable surface out of direct sunlight and away from draughts or heating/cooling vents, both of which can cause a small volume of water to swing in temperature faster than a larger, better-insulated tank would.

Maintenance is identical to the basic-finish 6x6x6 tank — the polished edge is a handling/finish upgrade, not a functional one.

• Bare (no filter): partial water changes roughly 2–3 times a week, always with a dechlorinator
• With a small sponge filter: water changes can drop to about once a week once cycled
• Temperature: tracks room temperature without a heater; a low-wattage nano heater is worth it if the room isn't consistently warm
• Cleaning: wipe the flat glass panels with an algae pad; avoid household glass cleaner around the tank
• Handling: the polished edges are noticeably safer during moves, cleaning, and reaching in for maintenance compared to a raw-cut edge, though normal care is still worth taking with any glass tank
• Evaporation: top up between full changes with fresh dechlorinated water, since a small open-top tank loses volume to evaporation faster than people expect
• Weight when filled: roughly 3.5kg of water plus the glass itself — manageable for most shelves and desks, but still worth a stable, level surface
• Seam quality: the same glue-seam construction as the basic-finish tank, just with the outer glass edges ground smooth — no difference in leak resistance or durability between the two finishes
• Watch the fish: gasping at the surface, clamped fins, or unusual lethargy often signal declining water quality before the water itself looks visibly dirty