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Best Match Items Ending First Newly-Listed Items First Price + Shipping: Lowest First Price + Shipping: Highest First

SEACHEM PRIME Water concentrated conditioner Fresh and Salt 100ml 250ml 500ml $31.60 Time Remaining: 29d 2h 31m Buy It Now for only: $31.60

6 7 HQGIN RIN HI SHOWA LIVE KOI FISH FROM JAPAN $49.99 Time Remaining: 14h 26m

16Showa Live Koi Fish Kodama Koi $195.00 Time Remaining: 10h 43m Buy It Now for only: $685.00

Aquarium CO2 Simple Regulator Diffuser Adjuster moss $20.99 Time Remaining: 14d 19h 27m Buy It Now for only: $20.99

19Showa Live Koi Fish Kodama Koi $225.00 Time Remaining: 10h 45m Buy It Now for only: $805.00

Vintage Aquarium Ornament Pagodas on a Bridgel $9.00 Time Remaining: 29d 23h 49m Buy It Now for only: $9.00

19Taisho Sanke Live Koi Fish Kodama Koi $230.00 Time Remaining: 10h 56m Buy It Now for only: $875.00

Xmas Moss Live Plant for Shirakura Shirmp Aquarium $3.75 Time Remaining: 4d 14h 32m Buy It Now for only: $3.75

19Kohaku Live Koi Fish Kodama Koi $330.00 (2 Bids) Time Remaining: 10h 55m

Aquarium CO2 Solenoid Regulator Bubble Counter Built in Check Valve DC02 04 SILV $76.00 Time Remaining: 29d 18h 51m Buy It Now for only: $76.00

18Ginrin Hi Utsuri Live Koi Fish Kodama Koi $295.00 Time Remaining: 10h 50m Buy It Now for only: $1,015.00

Up aqua Co2 diffuser aquarium 12 16mm NEW ATOMIZER SYSTEM DIY Co2 available $23.88 Time Remaining: 3d 19h 7m Buy It Now for only: $23.88

16Ginrin Hi Utsuri Live Koi Fish Kodama Koi $195.00 Time Remaining: 10h 51m Buy It Now for only: $665.00

18Ogon Live Koi Fish Kodama Koi $385.00 (1 Bid) Time Remaining: 11h

Moss Ball fish tank co2 live fern aquarium java plant O $4.70 Time Remaining: 26d 14h 6m Buy It Now for only: $4.70

6 7 HQ SHOWA LIVE KOI FISH FROM JAPAN $49.99 Time Remaining: 14h 22m

Marimo Moss Ball live aquarium plant java fish tank O $4.46 Time Remaining: 27d 16h 43m Buy It Now for only: $4.46

6 HQ GIN RIN SHOWA LIVE KOI FISH FROM JAPAN $65.00 Time Remaining: 1d 12h 43m

Round Pellia Live Aquarium Plant FREE Ship INV $5.60 Time Remaining: 2d 18h 40m Buy It Now for only: $5.60

6 HQ GIN RIN KOHAKU LIVE KOI FISH FROM JAPAN $39.99 Time Remaining: 23h 11m

300w submersible Aquarium Fish Tank Heater Warmer wCups $15.19 Time Remaining: 14d 6h 29m Buy It Now for only: $15.19

6 HQ GIN RIN HI UTSURI LIVE KOI FISH FROM JAPAN $39.99 Time Remaining: 23h 15m

110V 3W Submersible Water Pump Fountain Pond Aquarium $8.90 Time Remaining: 7d 20h 3m Buy It Now for only: $8.90

7 HQ KOHAKU LIVE KOI FISH FROM JAPAN $39.99 Time Remaining: 23h 14m

CO2 glass Drop Checker PH LONG TERM MONITOR fish tank test aquatic size small $2.66 Time Remaining: 10d 3h 50m Buy It Now for only: $2.66

1600 pcs Full Range1 14 pH Paper Litmus Test Strips Fish Food Cosmetic NEW $17.99 Time Remaining: 1h 36m Buy It Now for only: $20.99

Vintage Pagoda Aquarium Ornament Marked JAPAN in Black $3.99 (1 Bid) Time Remaining: 13h 18m

AC 110V 7W Submersible Water Pump Aquarium Fountain Pond Pump US Plug 04998 $12.34 Time Remaining: 14d 17h 48m Buy It Now for only: $12.34

14Hirenaga Ginrin Platinum Live Koi Fish Kodama Koi $195.00 Time Remaining: 11h 4m Buy It Now for only: $665.00

Aquarium Dual Gauge CO2 Regulator +Bubble Counter DC02 03 BLUE $58.99 Time Remaining: 19d 14h 3m Buy It Now for only: $58.99

18Taisho Sanke Live Koi Fish Kodama Koi $295.00 Time Remaining: 10h 58m Buy It Now for only: $1,120.00

NEW Quiet Oceanic Biocube 8 14 dual Fan upgrade Kit Plug Play BALL BEARINGS $29.90 Time Remaining: 1d 10h 11m Buy It Now for only: $29.90

17Kohaku Live Koi Fish Kodama Koi $235.00 Time Remaining: 11h 23m Buy It Now for only: $490.00

Weeping Moss Live Aquatic Plant Ornament FishTank INV $4.70 Time Remaining: 22d 18h 32m Buy It Now for only: $4.70

6 7 HQ BENI KIKOKURYU LIVE KOI FISH FROM JAPAN $39.99 Time Remaining: 1d 13h 1m

Co2 Tablet Aquarium Plant Diffuser FREE Ship INV $5.60 Time Remaining: 2d 19h 21m Buy It Now for only: $5.60

16Kohaku Live Koi Fish Kodama Koi $240.00 (1 Bid) Time Remaining: 10h 52m

15Hirenaga Kohaku Live Koi Fish Kodama Koi $170.00 Time Remaining: 11h 3m Buy It Now for only: $350.00

Fissidens fontanus Live Aquarium Plant Fish Moss INV $9.45 Time Remaining: 1d 13h 35m Buy It Now for only: $9.45

8Aka Matsuba Ogon Live Koi Fish Kodama Koi $160.00 (1 Bid) Time Remaining: 11h 29m

Xmas Moss For breeding luxury Benibachi Crystal Red Shrimp Cherry Japan $3.75 Time Remaining: 18d 19h Buy It Now for only: $3.75

15Showa Live Koi Fish Kodama Koi $215.00 Time Remaining: 10h 44m Buy It Now for only: $700.00

SEACHEM Flourish Excel organic carbon for planted aquaruim 250ml 500ml $31.60 Time Remaining: 10d 2m Buy It Now for only: $31.60

16Kohaku Live Koi Fish Kodama Koi $365.00 Time Remaining: 10h 54m Buy It Now for only: $910.00

New Beni kabuto ebi albino triops canciformis $9.99 Time Remaining: 23d 14h 39m Buy It Now for only: $9.99

15Taisho Sanke Live Koi Fish Kodama Koi $215.00 Time Remaining: 11h 22m Buy It Now for only: $420.00

JAVA FERN x3 +1FREE Live Aquarium Plant Java moss $12.99 Time Remaining: 21d 8h 42m Buy It Now for only: $12.99

9Kin Showa Live Koi Fish Kodama Koi $140.00 Time Remaining: 11h 25m Buy It Now for only: $160.00

Christmas Moss Aquarium moss wall FREE Ship INV $4.70 Time Remaining: 24d 12h 2m Buy It Now for only: $4.70

16Hirenaga Ginrin Hiutsuri Live Koi Fish Kodama Koi $195.00 Time Remaining: 10h 47m Buy It Now for only: $630.00

17Hirenaga Ginrin Hiutsuri Live Koi Fish Kodama Koi $240.00 Time Remaining: 11h 6m Buy It Now for only: $700.00

Echinodorus amazonicus x 3 stalks Live Aquarium Plant $4.70 Time Remaining: 24d 12h 21m Buy It Now for only: $4.70

6 HQ GIN RIN SHOWA LIVE KOI FISH FROM JAPAN $49.99 Time Remaining: 2d 23h 12m

Moss Wall Mesh Live aquarium java plant fish tank FB $7.55 Time Remaining: 5d 14h 25m Buy It Now for only: $7.55

14Heisei Nishiki Live Koi Fish Kodama Koi $205.00 (1 Bid) Time Remaining: 10h 48m

Root Tablet Live Aquarium Plant Fertilizer Aquatic INV $8.46 Time Remaining: 9d 19h 15m Buy It Now for only: $8.46

6Kin Showa Live Koi Fish Kodama Koi $155.00 Time Remaining: 11h 28m Buy It Now for only: $205.00

Java Fern REMOVE ALGAE moss Live Aquarium Pond Plant $3.75 Time Remaining: 26d 13h 11m Buy It Now for only: $3.75

6 7 HQ GOSHIKI LIVE KOI FISH FROM JAPAN $39.99 Time Remaining: 3d 12h 59m

60 Tablets of Metronidazole 200mg for Aquarium Fish $14.99 Time Remaining: 19d 17h 35m Buy It Now for only: $14.99

vintage 60yr OCCUPIED JAPAN FISH BOWL HANGER CLIMBING CAT steals FISH no damage $14.99 (1 Bid) Time Remaining: 3d 2h 35m

6Kin Showa Live Koi Fish Kodama Koi $140.00 Time Remaining: 11h 26m Buy It Now for only: $160.00

Java Fern x 1 bunch Live Aquarium Plant Moss Crs Fish $3.75 Time Remaining: 17d 11h 5m Buy It Now for only: $3.75

Vintage mare and foal aquarium ornament ceramic Japan 1950s 1960s $5.00 Time Remaining: 1d 12h 8m

Mineral Rock Cherry Crystal Red Shrimp Color Enhancer $7.55 Time Remaining: 16d 18h 57m Buy It Now for only: $7.55

220 240V Aquarium Fish Tank Pump Water Watermaker Waver Wave Maker 5000L H 12W $9.99 Time Remaining: 10h 31m

Moss Ball live plant for eheim hagen fluval rena canister filter aquarium O $4.70 Time Remaining: 12d 13h 58m Buy It Now for only: $4.70

36 OSRAM LED aquarium light marine seawater saltwater white blue leds $355.00 Time Remaining: 1d 23m

API Nitrate no3 test kit 90 test $10.08 Time Remaining: 6d 23h 36m Buy It Now for only: $10.08

48 in Osram SSL LED saltwater marine aquarium light lamp blue white leds $468.00 Time Remaining: 1d 1h 8m

Moss Ball t5 metal halide LED aquarium light plant O $4.70 Time Remaining: 21d 18h 27m Buy It Now for only: $4.70

24 in OSRAM LED marine aquarium lighting lamp replaceable plate blue white $242.00 Time Remaining: 20h 41m

Seachem Ammonia Alert Freshwater Marine Aquarium NH4 Monitor Indicator test $9.47 Time Remaining: 27d 4h 36m Buy It Now for only: $9.47

36 LED Tank lamp coral reef grow OSRAM high power 660nm hyper red 455nm blue $355.00 Time Remaining: 21h 38m

30 LED Aquarium Tank lamp coral reef grow maintain OSRAM hyper red blue $349.00 Time Remaining: 22h 8m

Anubias barteri var nana x 14+6 FREE aquarium plant $35.99 Time Remaining: 21d 9h 5m Buy It Now for only: $35.99

24 Osram SSL LED aquarium lighting marine seawater saltwater replaceable plate $242.00 Time Remaining: 23h 23m

Magnetic Cleaner For Salt and Plant Aquarium Brush Cleaning $2.04 Time Remaining: 5d 21h 19m Buy It Now for only: $2.04

48 inch Osram SSL LED aquarium light for plant grow hyper red white blue led $468.00 Time Remaining: 20h 26m

Xmas moss Aquarium Fish Tank 55 75 90 100 125 Gallon A1 $4.70 Time Remaining: 10d 20h 56m Buy It Now for only: $4.70

18 OSRAM LED plant grow tank aquarium light lamp hyper red white blue low heat $235.00 Time Remaining: 21h 8m

Co2 Diffuser Glass Nano for Aquarium live plants DIY Co2 YouTube available $4.70 Time Remaining: 24d 11h 40m Buy It Now for only: $4.70

48 LED Aquarium Tank lamp coral reef grow maintain OSRAM hyper red blue $468.00 Time Remaining: 23h 11m

Crypt wendtii green x 3 Live Aquarium Plant Tank INV $4.70 Time Remaining: 11d 13h 13m Buy It Now for only: $4.70

30 OSRAM aquarium light CORAL LED 55nm Blue 660nm Red + lunarlight extra cord $399.00 Time Remaining: 1d 27m

How to calculate the radiation at a certain distance from Japan?

I happen to know a man from California ( lets just say he's an idiot ) who is getting all freaked out about radiation reaching him from Japan's nuclear reactors. I was wondering how to calculate the level of radiation in southern california if the source is in Japan. ( what formula or equation?) I'm pretty sure the inverse-square law would work, but I never really used it much, so I'm kinda rusty. Then I can post it on facebook just to be a smart-ass and show him how ridiculous he's being.

yeah, the inverse square law is what you need, but you also need to know the amount of radiation produced at the plant (i have no clue, you'll have to find out online or something) and treat the plant itself as a point source of radiation, then divide that number by the distance from the plant to california squared (in metres) and you'll have the intensity of the radiation where you are. Dont worry, its MUCH too far to hurt north america at all. Even if the wind is pointing directly at us all the radioactive material will land in the pacific. We'll all be find.