Aquarium Water

Is old freshwater aquarium water good for houseplants?

I have an established freshwater aquarium. When I do water changes, I want to be frugal and use the water to water my plants. Is this a good idea?

Sure, as long as you don’t have copper or zinc salts… those tend to be pretty tough on plants at low concentrations.

Fish Tank Maintenance : Changing Fish Tank Water

Flame Moss pad -Live aquarium plants water low light kh $3.76

Aquarium Fish Tank Fresh Salt Water Air Pump Filter $9.46

2 in1 Aquarium Bio-Chemical Filter & Immersible Water Pump Energy-saving 250L/H $1.17

18.9" Height Purple Ornament Water Plant for Aquarium $12.77

Tetra Water Wonders 12" Red Ludwigia Aquarium Plant New $3.50

Free shipping!!! 250 Ltr Bio Filter/Immersible Water Pump Aquarium Tank $7.90

EC-150 Water Chiller for Aquariums / Hydroponics - 26 Gal Capacity - 200W - NICE $177.50

Built In Biochemical Sponge Aquarium Water Filter Pump $12.88

An Essential Guide to Choosing Your Cold Water Aquarium Fish by Nick Fletcher... $1.49

Aquarium Water Wonder Red Plastic Plant Ornament 5 Pcs $4.72

NEW 0~10% Salinity Refractometer Salt Water Aquarium SG $17.70

Multifunctional Aquarium Tank Submersible Biochemical Water Pump Filter 1500L/H $1.52

10 lb Activated Carbon LARGE pellets coarse-Aquarium-Pond-Water Filters $43.98

Digital LCD Aquarium Thermometer Fish Tank Water Marine $5.50

15 lb Activated Carbon LARGE pellets coarse-Aquarium-Pond-Water Filters $57.98

Aquarium Tank Liquid Water Level Sensor Floating Switch $5.52

GREAT! 5000L/H AQUARIUM POWERHEAD WAVE MAKER WATER PUMP MAGNET $36.99

Seachem Prime Aquarium Water Conditioner 8.5 oz 250ml $11.90

69" Siphon Vacuum Pump For Aquarium Fish Tank Gravel Water Cleaning Change DD3 $0.99

Aquarium Submersible Water Filter 720L/H Fish Tank $0.99

Seachem Prime Aquarium Water Conditioner 3.4 oz 100ml $7.70

Digital LCD Fish Aquarium Water Terrarium Thermometer $51.07

GREAT! 800GPH FISH TANK AQUARIUM WATER PUMP GARDEN POND ADJUST FLOW ADJUSTABLE $51.99

GREAT! 670GPH FOUNTAIN KOI POND AQUARIUM WATER PUMP ADJUST FLOW ADJUSTABLE $43.95

Aquarium Decorative Water Plastic Plant Purple Green $7.74

Green Standing Plastic Plant Water Wonder for Aquarium $8.93

Aquarium Fish Tank Decor Emulational Water Plant Green $16.30

Fish Aquarium Mini Black Soft Sponge Water Filter New $5.73

20 lb Activated Carbon LARGE pellets coarse-Aquarium-Pond-Water Filters $69.00

25 lb Activated Carbon LARGE pellets coarse-Aquarium-Pond-Water Filters $81.99

Aquarium Ornament Plastic Tree Green Water Plants 5 Pcs $4.48

Pure Water Foam Lotus Garden Pond Aquarium Ornament $6.44

50 lb Activated Carbon LARGE pellets coarse-Aquarium-Pond-Water Filters $139.99

GREAT! 480GPH SUBMERSIBLE AQUARIUM KOI LOTUS POND WATER PUMP ADJUSTABLE FLOW $33.49

PRO PUMP 950 GPH WATER PUMP AQUARIUM GARDEN $88.00

PRO PUMP 700 GPH WATER PUMP AQUARIUM GARDEN $95.00

PRO PUMP 500 GPH WATER PUMP AQUARIUM GARDEN fish koi pond $95.00

PRO PUMP 500 GPH WATER PUMP AQUARIUM GARDEN fish koi pond $87.00

Aquarium Fish Tank Aquatic Plastic Plants Wheat Shape Green Water Decoration $0.01

GREAT! 2 X 1300GPH AQUARIUM WATER PUMP WAVEMAKER MAGNETIC BASE $56.99

Oceanic Aquarium Reef Reverse Osmosis Water Filter system 6 stage /pump 150 GPD $199.00

Salinity Refractometer 0~28% Salt Water Marine Aquarium $17.60

GREAT! AQUARIUM FISH TANK WATER PUMP GARDEN POND 670GPH ADJUST FLOW ADJUSTABLE $43.95

Premier Water Heavy Duty Aquarium Reef Reverse Osmosis Water Filter System 150 $115.00

1035 GPH Pump Water Fountain Pond Submersible Aquarium sump powerhead new fall $42.99

2 lb highly Active Activated Carbon for any filter, water-chemical-Aquarium-Pond $13.99

3x Marimo Moss Ball Aquarium Fresh Water Plant Giant $14.00

52GPH Pump Submersible Water Hydroponic Aquarium New US $10.79

Aquarium Water Level Sensor Plastic Floating Switch New $6.01

Nice Water Proof 57 LED 47.5cm 1.56ft Blue Aquarium Turtle Fish Tank LED Lights $0.46

1 HP 12K BTU aquarium hydroponics water chiller NEW $899.99

3 in 1 Aquarium Submersible Water Pump Filter 15W G20 $0.99

Aquarium Purple Blue Leaf 14" High Plastic Water Plant $13.15

New 100W Aquarium Tank Adjustable Submersible Heating Pipe Water Heater Warmer $57.29

1 lb. Activated Carbon. Fresh or Salt water aquariums . Pharmaceutical Grade! $10.95

Reverse Osmosis Water Filter Reef Aquarium RODI AutoTop w/ Adjust Float Valve $145.00

NEW KOI POND SALT N FRESH AQUARIUM WATER PUMP 4755 GPH $99.99

Carbon Lignite Premium Grade Activated Reef Aquarium 4 lbs Crystal Clear Water $15.49

Aquarium Reverse Osmosis Water Filter System 150 gallons Per Day Fresh Water $99.00

740 GPH Submersible Water Pump Powerhead Pond Aquarium Fountain Reef Coral CSA $46.95

2 370 GPH Submersible Aquarium Pond Water Pump Powerhead Freshwater Marine Reef $35.90

GREAT! AQUARIUM SUBMERSIBLE POND WATER PUMP POWERHEAD 480 GPH $32.95

Green Plastic Water Plants for Aquarium Aquascaping $7.39

YEAH~215 GPH FISH TANK AQUARIUM POND WATER PUMP & FILTER KIT $28.99

160 GPH FRESH SALT WATER FISH TANK AQUARIUM PUMP MARINE $23.99

YEAH~480 GPH SUBMERSIBLE AQUARIUM POND WATER PUMP 1500 L/H FLOW ADJUSTABLE $33.49

SPECIAL~ 480GPH SUBMERSIBLE AQUARIUM KOI LOTUS POND WATER PUMP ADJUSTABLE FLOW $33.49

WOW! 1600 GPH AQUARIUM DUAL POWER HEAD WATER PUMP WAVE MAKER $24.99

COOL~ 3000L/H AQUARIUM POWERHEAD WAVEMAKER WATER PUMP 800 GPH $18.99

YEAH~800 GPH FISH TANK AQUARIUM WATER PUMP GARDEN POND ADJUST FLOW ADJUSTABLE $51.99

99 GPH Submersible Water Pump Fountain Aquarium Garden Pond DJ2 $0.99

580 GPH Submersible Aquarium Pond Water Pump CSA Powerhead Freshwater Saltwater $39.95

7X 370GPH Submersible Water Pump Aquarium Pond Fountain Freshwater Saltwater Koi $69.95

Aquarium Ornament Ceramic Base 19.7" Height Water Plant $12.98

72" TROPICAL FISH BANNER SIGN fishes saltwater signs aquarium supplies water $34.99

69" Siphon Vacuum Pump For Aquarium Fish Tank Gravel Water Cleaning Change SK2 $0.99

Quite Aquarium Water Pump Submersible Pump 4W 220V AC 0.8M 300LPH Small Pump $9.70

USB Powered / 2 AA Battery Toy Water Sea Aquarium Fishes Fish Tank W/ UV Light $8.66

Legoland CA Aquarium Water Park buy 1 get 1 free day hopper discount ticket $2.59

GREAT! 480 GPH FRESH SALT WATER FISH TANK MARINE AQUARIUM PUMP FLOW ADJUSTABLE $33.49

Vivid Yellow Plastic Fish Aquarium Water Tank Decor $8.30

NEW Water Resistant Aquarium Fish Tank 57 White LED Lights Bar Submersible $0.62

GREAT! 800GPH FOUNTAIN KOI POND AQUARIUM WATER PUMP ADJUST FLOW ADJUSTABLE $51.99

1.5" LCD Waterproof Aquarium Water Temperature Digital Thermometer (1 x LR44) $4.69

Dual Function 1.5 HP Hydroponics Aquarium Water Chiller Cooling / Heating System $1,099.95

10.2" Aquarium Water Plants Ornament Grn w Ceramic Base $12.55

Aquarium Ornament Plastic Purple Red Water Plant Grass $5.71

Aquarium brush -Cleaner For Filter,Water Pump,Tube $10.99

Aquarium Water Level Sensor Liquid Plastic Float Switch $5.84

2x Anubias nana mini - Live aquarium plants water moss $9.50

Man-made Water Plant Aquarium Decor w Ceramic Base $7.73

20" Whole House Water Filter, Aquarium filter housing $46.90

Pool Aquarium Digital TDS Water Quality Tester Meter $2.69

aquarium water pump $15.00

aquarium water pump $15.00

GREAT! 2 X 3200GPH AQUARIUM DUAL WATER PUMP WAVEMAKER MAGNETIC $64.99

Aquarium Plastic Water Grass Ornament Purple Blue $6.62

Oceanic REVERSE OSMOSIS RO/DI REEF AQUARIUM REEF WATER FILTER 6 STAGE 150 GPD $148.00

Pueple White Man-made Water Plants Aquarium Decoration $12.41

Artificial Fish Tank Aquarium Water Grass Light Green $8.06