Green pool cleanup in Deltona, FLfrom green to swimmable

Algae spores are always in the water; a pool stays clear only because chlorine kills them faster than they multiply. Break that balance for a few days in a Florida summer and you have a green pool. The usual causes, in rough order:

• The pump stopped. A tripped breaker, a timer knocked off after a power cut, or a motor that quietly died. With no circulation nothing reaches the filter. This is the usual cause of a pool that went green "overnight".
• The filter is loaded. A cartridge or DE filter long overdue a clean passes water but catches nothing. The pump runs, the gauge reads high, and the pool clouds, then greens.
• Stabiliser lock. Years of chlorine tablets push cyanuric acid so high that chlorine shows on a test strip but is too tied up to sanitise. Owners keep adding chlorine and nothing changes.
• No stabiliser at all. A freshly filled or heavily rained-out pool loses its chlorine to the sun by lunchtime.
• Time. A holiday, a house sale, a few weeks of afternoon storms with nobody testing. Under oak canopy, leaves on the floor feed the bloom.

Green algae is the common one and clears fastest. Mustard algae clings to shaded walls and comes back if the brushing is half done. Black algae roots into plaster and takes the most brushing of all. We tell you which you have on the first visit, because it sets the number of visits.

Chemicals alone will not clear a green pool. Circulation and filtration do most of the work, so the process is built around a running pump and a filter cleaned as it loads.

Visit one: diagnose, clear, shock

We test the water, including stabiliser and pH, and check that the pump pulls and the filter can still catch something. Leaves and debris come off the floor so they do not soak up chlorine. pH is brought down to where chlorine works, the pool is shocked hard, and every surface is brushed so the algae releases into the water where the chlorine can reach it. The pump stays on around the clock.

Visits two to four: brush, filter, repeat

Each return visit the walls and floor are brushed again, the filter is cleaned or backwashed as dead algae loads it, chlorine is re-tested and topped up, and algaecide added where it helps. The water goes green, grey-blue, cloudy white, clear; cloudy white means the algae is dead and the filter is doing the rest.

Final visit: rebalance and hand over

Once the floor is visible the full panel is rebalanced, the filter gets a final clean, and you get the numbers in writing with a plain explanation of what caused it and what to watch.

If at any point the pool is not responding because the pump will not run or the stabiliser is locked, we stop and tell you, rather than keep dosing water that cannot clear.

Most can, and chemical recovery is usually cheaper than replacing the water. A few conditions change that answer, and you should know them before we start, not after four visits:

Anything in the right-hand column is work we do not do. Draining a pool, acid washing plaster and replacing a pump or filter element are all jobs for a licensed pool contractor, and in this part of Florida draining also carries its own risks with the water table. We identify the problem, tell you plainly, and pick the recovery back up once it is dealt with. We will not quote a chemical recovery we can see is not going to work.

There is no fixed price for a green pool, because two green pools can be a day or a week apart in work. We price it from the first visit's findings and confirm the number before the first treatment, so you know the cost of the whole recovery, not just the first bag of shock. What sets it:

• How far gone it is. If the steps are visible, it is a short job. If the floor has not been seen in a month, it is a longer one.
• Pool size. Chlorine demand scales with gallons; a large pool with a spa takes more product every visit.
• Filter type. Sand filters backwash in minutes. Cartridges have to be pulled and hosed each time they load with dead algae, which on a bad pool is every visit. DE sits in between.
• Debris on the floor. A season of oak leaves on the floor means a long netting and vacuuming session before the chemistry starts.
• Stabiliser level. High stabiliser means more chlorine to get the same kill, or a conversation about replacing water.
• Type of algae. Mustard and black algae take more brushing and more visits.

The quote covers the visits it takes to clear the pool as scoped. It does not cover equipment work or water replacement, which are referred out, or weekly care afterwards, which is a separate month-to-month decision. A pool that is dirty but still blue needs a one-time cleaning instead; we will tell you if that is what you have.

A recovery is a process you can watch, and it helps to know what is normal.

The water changes colour in stages. Green is live algae. Grey or dull blue within a day of the shock means it is dying. Cloudy white means it is dead and suspended, and from here the filter does the work. If the water is still bright green a day after a heavy shock, something is stopping the chlorine, usually stabiliser or circulation, and we will already be looking at why.

The pump runs continuously. Leave the timer on manual for the duration. Every hour through the filter is progress; switching off overnight undoes a lot of it.

The filter pressure climbs fast. We clean or backwash it on each visit; if the gauge spikes between visits, tell us and we come sooner.

Keep people and pets out. Shock levels of chlorine are far above swimming range. Nobody swims, and the dog does not drink from it, until the final test says the chlorine is back to normal.

It may smell. The sharp chlorine smell early on is combined chlorine from the kill; it fades as the water clears.

You do not need to be home. Gate access and power to the pump are all we need. A photo and note after every visit let you watch the colour change yourself.

A pool that has gone green once has shown you exactly how it fails. The last visit is as much about that as the water.

You get the final chemistry in writing, with the cause named: the breaker that tripped, the filter that had not been cleaned, the stabiliser that had crept up over years of tablets. If the cause was equipment, the referral to a licensed pool contractor is in the same note. If it was the filter, a proper filter cleaning is the follow-up that stops the next bloom. If it was stabiliser, we explain how to keep it in range, which usually means changing how the pool is chlorinated.

Then there is the choice of who tests the water next week. Plenty of people go back to doing it themselves, and the written numbers give them a clean start. Others move onto the weekly route, where the pool is tested and brushed every seven days, chemicals are included, and there is no contract to sign. We mention it once, on the final visit, and leave it there.

The measure of a good recovery is not how fast the water cleared but whether it is still clear in August, which is why the first visit finds the cause and the last one explains it. Book the first visit or send us a photo of the pool and we will tell you what we think it needs.