Seaweed

For the larger variant, see giant seaweed.

Seaweed
Released							18 March 2002 (Update)
Members							Yes
Quest item							No
Properties
Tradeable							Yes
Equipable							No
Stackable							No
Noteable							Yes
Options							Drop
Examine							Slightly damp seaweed.
Values
Value							2 coins
High alch							1 coin
Low alch							0 coins
Weight							0.2 kg
Respawn time							100 ticks (60 seconds)
Grand Exchange
Exchange							13 coins (info)
Buy limit							13,000
Daily volume							807,859
View real-time prices
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Advanced data
Item ID							401

Seaweed is an item dropped by creatures near water like Rock Crabs. It can be used with a fishbowl that is full of water so that you can catch a fish in the Catherby aquarium. Seaweed can be used for normal compost.

Seaweed can be cooked on a range or fire to create soda ash, an ingredient for molten glass, but this awards no experience. Seaweed may also be used in place of soda ash in the superglass make lunar spell, skipping the need to convert it to soda ash.

Uses

Achievement Diary

• Easy Karamja Diary: Collect 5 seaweed from anywhere on Karamja.

Comparing Molten Glass yield and XP

When using soda ash and buckets of sand in a furnace the molten glass yield is

1.0 molten glass per soda ash and bucket of sand.

When using Superglass Make with soda ash and buckets of sand the molten glass yield is

1.3 molten glass per soda ash and bucket of sand.

When used on a fire, giant seaweed turns into six soda ash upon successfully cooking, rather than just one given by normal seaweed. You can however fail, resulting in only one soda ash. Note that Cooking gauntlets do not decrease the cooking fail chance, however the Hosidius Kitchen cooking range effect still applies.

When used in conjunction with the Superglass Make spell, giant seaweed similarly acts as six regular seaweed and gives 60 Crafting experience per seaweed when cast. The combination of two giant seaweed and 12 buckets of sand yields on average 1.45 molten glass per bucket of sand, while the combination of three giant seaweed and 18 buckets of sand yields an average of 1.6 glass per sand, although with the latter some of the glass will fall on the floor as it overflows from the inventory. If it is not picked up, it results in an average of 1.488 glass per sand. If players obtain the sand via mining sandstone, it is slightly more efficient to not pick up the excess despite the lower return due to how quickly the materials can be obtained.

The average Crafting experience per giant seaweed varies:

• For an average of 1.45 glass per sand (two giant seaweed and 12 buckets of sand), each giant seaweed equals 538.5 experience when making lantern lenses or 669 experience when making empty light orbs;
• For an average of 1.488 glass per sand (three giant seaweed and 18 buckets of sand without picking up the excess), each giant seaweed equals 551 experience when making lantern lenses or 685 experience when making empty light orbs;
• For an average of 1.6 glass per sand (three giant seaweed and 18 buckets of sand and picking up the excess), each giant seaweed equals 588 experience when making lantern lenses or 732 experience when making empty light orbs.

These numbers include the experience from casting Superglass Make.

Products

Item		Members	Skills	XP	Materials
	Fishbowl (seaweed)		None	None	1 × Fishbowl 1 × Seaweed
	Ground seaweed		1	1	1 × Seaweed
	Molten glass × 16.9 (Superglass Make - seaweed)		61 77	130 78	13 × Bucket of sand 13 × Seaweed 2 × Astral rune 6 × Fire rune 10 × Air rune
	Soda ash (Seaweed)		1	0	1 × Seaweed

Item sources

For an exhaustive list of all known sources for this item, see here.

Source	Level	Quantity	Rarity
Ammonite Crab	25	1–2	8/128
Ammonite Crab	25	5	2/128
Baby impling jar	N/A	1	1/100
Baby impling	17; 27	1	1/100
Cave kraken	127	30 (noted)	6/200
Dagannoth (Waterbirth Island) Level 88	88	1–10	30/128
Dagannoth spawn	42	1	10/128
Dagannoth	74; 92	10	2/128
Fishing spot (big net, harpoon)	16	1	Uncommon
Giant Sea Snake	149	5	2/128
Giant lobster (Ghosts Ahoy)	32	1	Always
Giant lobster	45	1	4/128
Giant lobster	45	2	4/128
Giant lobster	45	5	2/128
Ice troll female Variant 1		3–9 (noted)	10/128
Ice troll grunt	100	3–9 (noted)	10/128
Ice troll male Variant 1		3–9 (noted)	10/128
Ice troll runt Variant 1		3–9 (noted)	10/128
Kraken	291	125 (noted)	3/128
Lobstrosity	68	6 (noted)	8/118
Mogre	60	1	2/128
Net	N/A	1	Always
Reward pool	N/A	20–60 (noted)	1/40
Rock Crab	13	1	4/128
Rock Crab	13	2	4/128
Rock Crab	13	5	2/128
Rock lobster	127	1–3	10/128
Sand Crab	15	1	4/128
Sand Crab	15	2	4/128
Sand Crab	15	5	2/128
Sea Snake Hatchling	62	5	2/128
Sea Snake Young	90	5	2/128
Swamp Crab	55	2–8	4/128
Waterfiend	115	20–30 (noted)	2/128

Spawns

Location	Members	Spawns	Map
Karamja - all around the east and west coast		30	Maplink
Mos Le'Harmless - islands off the north-east coast		4	Maplink
Entrana - north-western coast		10	Maplink
Kourend - all around the southeast coast		60	Maplink
Fremennik Province - north of Keldagrim entrance		9	Maplink

Shop locations

This list was created dynamically. For help, see the FAQ. To force an update of this list, click here. For an exhaustive list, see here.

Seller	Location	Number in stock	Restock time	Price sold at	Price bought at	Change Per	Members
Dom Onion's Reward Shop	Yanille	∞	N/A	200	N/A	0.0%
Trader Stan's Trading Post	Catherby	20	1m	5	0	2.0%
Trader Stan's Trading Post	Port Tyras	20	1m	5	0	2.0%
Trader Stan's Trading Post	Brimhaven	20	1m	5	0	2.0%
Trader Stan's Trading Post	Port Sarim	20	1m	5	0	2.0%
Trader Stan's Trading Post	Port Phasmatys	20	1m	5	0	2.0%
Trader Stan's Trading Post	Corsair Cove	20	1m	5	0	2.0%
Trader Stan's Trading Post	Prifddinas	20	1m	5	0	2.0%
Trader Stan's Trading Post	Mos Le'Harmless	20	1m	5	0	2.0%
Trader Stan's Trading Post	Ship Yard	20	1m	5	0	2.0%
Trader Stan's Trading Post	Port Khazard	20	1m	5	0	2.0%
Trader Stan's Trading Post	Musa Point	20	1m	5	0	2.0%

Other sources

• Collecting from nets at the Piscatoris Fishing Colony. The nets take three seconds to respawn.