Chlorine is added to municipal water supplies to protect against bacteria — which is good for your health, but hard on your body from the outside. When chlorine contacts your skin and scalp during a shower, it strips away natural oils that keep skin moisturized and the scalp barrier intact. Over time this contributes to dryness, tightness after showering, irritation, and for people with sensitive skin, flare-ups of eczema or acne.

For hair, chlorine and heavy metals weaken the protein bonds that give strands their strength and shine — leading to breakage, dullness, faster color fading (especially for color-treated hair), and increased frizz. A filtered shower head removes these compounds before they reach you. Most people notice a difference in how their skin and hair feel within the first week or two of switching to filtered water.

The sproos! shower filter cartridge should be replaced every 90 days — roughly once a quarter — under typical household use. This accounts for daily showers at average water usage. If your household uses the shower more heavily, has multiple users sharing a single filtered shower, or lives in an area with particularly hard or heavily chlorinated water, you may want to replace closer to the 60-day mark.

The most reliable indicator is visual: a used cartridge's PP cotton layer will have visibly darkened compared to a fresh white one. If you're on the subscribe-and-save plan, your replacement arrives automatically at the right interval so you never have to think about it.

Replacing the sproos! filter cartridge takes about two minutes and requires no tools. Unscrew the filter housing from the hand shower, pull out the used cartridge, drop in the new one, and screw the housing back on. That's it.

The cartridge is designed for easy access — there are no complex fittings or plumbing involved. The used cartridge and housing are recyclable; sproos! is designed from the ground up to reduce waste, and the cartridge's recyclable design is part of that commitment. Full replacement instructions are printed on the packaging and available online.

The sproos! Shower Filter Cartridge is available as a one-time purchase or as a subscription delivered every 90 days. The subscription saves 20% per cartridge and means your replacement arrives before your current filter runs out — no calendar reminders, no reordering, no gap in filtration.

For most people with a filtered sproos! shower, the subscription is simply the better option: lower cost, zero friction. If you're gifting a cartridge or replacing ahead of schedule, the single purchase works perfectly. Either way, the cartridge itself is identical.

The sproos! replacement filter cartridge is compatible with all sproos! filtered shower products: the Hand Shower + Filter, the Shower Kit + Filter, and the Shower Filter Upgrade (which adds filtration to an existing sproos! hand shower). All three use the same dual-stage cartridge and the same housing, so there's one replacement to order regardless of which filtered setup you have.

If you're unsure which version you have, check the filter housing on your hand shower — if it's a sproos! filtered product, this cartridge fits.

Most budget shower filters use activated carbon to reduce chlorine. Carbon is effective at chlorine removal when fresh but degrades relatively quickly, particularly in warm water — which is exactly the environment of a shower.

KDF-55, the media used in sproos! cartridges, works via an electrochemical process that is more stable at higher temperatures and maintains performance throughout the 90-day lifespan more consistently than carbon. KDF-55 also targets heavy metals including lead, mercury, and chromium — compounds that carbon filters handle less effectively. The sproos! cartridge uses KDF-55 made in the USA, tested by a third-party agency, and rated to remove 85% of chlorine over its full lifespan.

Every 90 days under typical household use — roughly once per quarter. In high-use households or areas with heavily chlorinated or hard water, you may benefit from replacing closer to every 60 days. The PP cotton layer of the cartridge will visibly darken with use — a used cartridge looks noticeably different from a fresh one, which is the clearest signal that it has been working and that it's time to replace.

The most reliable indicator is time: 90 days of regular use is the recommended replacement interval. Visual confirmation is also possible — remove the cartridge and compare the PP cotton layer to a fresh one. A filter that needs replacing will be visibly discolored from the rust, sediment, and particles it has been catching. If you're noticing any return of dryness or irritation after showering, reduced water pressure, or any change in water smell, those can also be signs that the cartridge is due for a replacement.

Yes. The same replacement cartridge works across all sproos! filtered shower products: the Hand Shower + Filter, the Shower Kit + Filter, and the Shower Filter Upgrade. All use the same dual-stage housing and the same cartridge design. You only need to order one type of replacement regardless of which filtered sproos! setup you have.

Unscrew the filter housing from the hand shower by hand — no tools needed. Pull out the used cartridge, drop in the new one with the same orientation, and screw the housing back on until snug. The full process takes about two minutes. Instructions are printed on the packaging and available in video format online. The used cartridge and housing are recyclable.

The sproos! 2-stage cartridge removes chlorine, chloramine, heavy metals (including lead and mercury), rust, silt, and sediment. It has been third-party tested to remove 85% of chlorine over its full lifespan — significantly above the industry standard of 50%. It does not soften hard water in the way a whole-home water softener would, but it does remove the compounds most responsible for dry skin, hair damage, and irritation from shower water.

The cartridge is identical either way. The subscription delivers a replacement automatically every 90 days at a 20% discount. It's the simpler and more cost-effective option for anyone with a filtered sproos! shower. The single purchase is ideal if you need a one-off replacement or want to try before committing to a subscription. You can start, pause, or cancel the subscription through your sproos! account at any time.

Water can contain chlorine and heavy metals at levels that affect skin and hair without being detectable by taste, smell, or feel. The effects tend to become apparent over time — gradual dryness, hair that feels duller or more brittle, or sensitivity in people with eczema-prone or acne-prone skin. If your skin and hair feel good after showering and you haven't noticed any of these patterns, a filter is still a beneficial upgrade but less urgent. If you've noticed any of the above, filtered shower water is one of the most direct ways to address the cause rather than the symptom.