Just Bought a House With a Neglected Pool in Frisco? Start Here

Recovering a neglected pool in Frisco takes 7-14 days and costs $200-1,100 depending on severity — light green pools recover in 3-5 days for $200-350, while severe black-green pools require 7-14 days and $600-1,100 in chemicals and labor. The process requires aggressive shocking, 24/7 pump operation, daily filter cleaning, and a full chemistry rebalance once the water clears.

This happens constantly in Frisco's resale market. Sellers stop maintaining the pool during listing, the pool deteriorates over 60-90 days, and the buyer inherits a recovery project on day one of homeownership. Here's the systematic approach from swamp to swim-ready.

Here's the systematic approach to inheriting a neglected pool, from worst-case green swamp to swim-ready in 7-14 days.

Day 1: Assessment (Don't Touch Anything Yet)

Before adding chemicals, turning on equipment, or calling anyone — assess what you're working with.

Water Condition

Green but translucent (you can see the bottom faintly): Light algae bloom. Recovery time: 3-5 days. Chemical cost: $50-100.

Green and opaque (can't see the bottom of the shallow end): Moderate algae. Recovery time: 5-7 days. Chemical cost: $100-200.

Dark green or black-green (looks like a pond): Severe algae. Recovery time: 7-14 days. Chemical cost: $200-400. May require partial drain and refill if the water is beyond chemical recovery.

Brown or rust-colored: Metal contamination — usually iron from well water or corroded equipment. This requires metal sequestrant treatment before shocking. Shocking without sequestrant will set the stains permanently.

Equipment Inspection

Walk to the equipment pad and look for:

Pump: Does it turn on? Does it move water? Is the housing cracked? Is it leaking from the shaft seal? Is it making unusual noise?

Filter: What type — cartridge, sand, or DE? When was it last cleaned? (If you can't tell, assume it hasn't been cleaned in months.)

Heater: Visible corrosion, rust, damaged exhaust vent, or rodent nests in the combustion chamber? Don't try to fire the heater until the pool is recovered and circulating properly.

Salt cell (if applicable): Visible scale on the plates? Error codes on the control board? What's the salt reading showing?

Electrical: Are all breakers on? Is the GFCI functional (test button works)? Any visible wiring damage, melted connections, or burn marks?

Structural

Plaster: Rough, stained, etched, or showing exposed gunite? Roughness indicates age or chemical damage. Visible gunite means the plaster is past its life and needs resurfacing.

Tile: Cracked tiles, missing tiles, heavy calcium scale on the waterline?

Deck: Cracks, heaving, settling, separation from the coping? In Frisco's clay soil, deck damage often indicates soil movement that may also be affecting the pool shell.

Coping: Loose stones, mortar gaps, separation from the beam?

Day 2-3: Stabilize the System

Get the pump running

If the pump works, start it running 24/7. Circulation and filtration are the foundation of recovery. If the pump doesn't start, check the breaker first, then the timer. If neither solves it, you need a pump repair or replacement before recovery can begin.

Clean the filter

Whatever condition the filter is in, clean it before starting recovery. A dirty filter restricts flow and can't capture the algae and debris that the recovery process will generate. For cartridge filters, pull the cartridge and rinse thoroughly — if it's older than 2 years and looks worn, replace it ($60-100). For sand filters, backwash for 3-5 minutes. For DE filters, break down and clean the grids, then recharge with fresh DE.

Remove visible debris

Net out leaves, branches, and anything floating or sunk to the bottom. Don't vacuum yet — you'll vacuum after the chemical treatment kills the algae and the dead cells settle.

Day 3-5: Chemical Recovery

Test everything first

Before adding anything, test: free chlorine, pH, alkalinity, cyanuric acid (CYA), and calcium hardness. This tells you what's missing and what's excessive.

Common findings in neglected pools:

• Free chlorine: 0 ppm (completely depleted)
• pH: 7.8-8.2 (drifted high from no acid additions)
• Alkalinity: 120-160 ppm (high from no management)
• CYA: 80-150+ ppm (if previous owner used chlorine tabs for years)
• Calcium: 400-600+ ppm (concentrated from evaporation without drain)

The recovery sequence

Step 1: Lower pH to 7.2. Add muriatic acid to bring pH down. Chlorine works 3x more effectively at pH 7.2 than at 7.8. Don't skip this step — shocking at high pH wastes chlorine.

Step 2: Shock aggressively. Triple shock dose: 3 gallons of liquid chlorine for a 15,000-gallon pool. Add in the evening after sunset so UV doesn't burn it off before it works.

Step 3: Brush everything. All walls, floor, steps, behind ladders, around the main drain. Brushing breaks up algae colonies and exposes them to the chlorine.

Step 4: Run the pump 24/7. Don't turn it off until the water is clear. Continuous circulation distributes the chlorine and continuous filtration removes dead algae.

Step 5: Clean the filter every 12-24 hours. The filter will load rapidly with dead algae. If you don't clean it, flow drops, filtration stops, and recovery stalls. This is the most labor-intensive part of recovery — plan on cleaning the filter 3-5 times during a full recovery.

Step 6: Re-shock daily. Test chlorine each morning. If it's dropped below 5 ppm overnight (the algae consumed it), add another 1-2 gallons of liquid chlorine. Continue until the chlorine holds above 5 ppm overnight without dropping — that means the algae demand is exhausted.

Step 7: Vacuum to waste (if possible). Once the water transitions from green to cloudy white/blue, vacuum the dead algae off the floor directly to waste (bypassing the filter). This removes the dead algae faster than filtering and reduces filter cleaning cycles.

If CYA is too high

If you test CYA and it's above 80 ppm — a common finding in neglected pools where the previous owner used chlorine tabs for years — the chlorine can't work effectively regardless of how much you add. You may need to partially drain and refill the pool to dilute the CYA before the shock treatment will be effective.

Drain 1/3 to 1/2 of the pool, refill with fresh tap water, then proceed with the shock treatment. This adds a day to the recovery timeline but makes the chlorine actually work.

Day 7-14: Rebalance and Maintain

Once the water is clear:

Full chemistry rebalance. Test everything again and adjust to target ranges: FC 2-3 ppm, pH 7.2-7.4, alkalinity 70-90 ppm, CYA 30-50 ppm, calcium below 400 ppm.

Equipment assessment. Now that the pool is circulating and clear, assess the equipment condition properly. Note any issues — pump noise, filter pressure problems, heater function, salt cell output. These need to be addressed, but not during the recovery phase.

Plaster assessment. With clear water, you can finally see the plaster condition. Note staining, roughness, etching, and any structural concerns. Get a professional opinion on whether the plaster needs immediate attention or has remaining useful life.

Start weekly service. The worst thing you can do after recovering a neglected pool is go back to neglecting it. Start weekly professional service immediately — the pool is now in a baseline condition that weekly maintenance can preserve.

What It Costs to Recover a Neglected Pool

Condition	Chemical Cost	Labor/Service	Total
Light green (3-5 day recovery)	$50-100	$150-250	$200-350
Moderate green (5-7 day recovery)	$100-200	$250-400	$350-600
Severe green (7-14 day recovery)	$200-400	$400-700	$600-1,100
Beyond recovery (drain/acid wash/refill)	$300-600	$500-1,000	$800-1,600

Add potential equipment costs: filter cartridge ($60-100), pump repair if needed ($200-500), and any other equipment issues discovered during recovery.

How to Avoid This When Buying

Get a dedicated pool inspection before closing. Not the 15-minute pool section of the home inspection — a real pool inspection from a CPO-certified technician who evaluates structure, equipment condition, safety compliance, and provides estimated costs for identified issues. This gives you negotiation leverage and a maintenance roadmap. See our complete guide on pool inspections before buying in Frisco.

Negotiate a pool maintenance credit. If the pool is neglected at closing, negotiate $500-1,000 from the seller to cover recovery costs. This is standard — sellers who stopped maintaining the pool during listing should expect a credit request.

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Just bought a house with a neglected pool? Hydra Pool Services recovers neglected pools and transitions them into weekly maintenance across Frisco and all of North DFW. Get your pool recovered →