(put title here)

*INTERNATIONAL SURVEY ON REEF AQUARISTIC*	GERMANY	REST EUR.	REST WORLD

*GERMANY vrs. REST EUROPE vrs. REST WORLD*	n = 155	n = 170	n = 358

All numbers in %



#1 A
*SEX*
male	96	95	91
female	4	5	8
#1 B
*AGE*
0-9 years	0	0	0
10-19 years	1	1	5
20-29 years	11	15	32
30-39 years	41	41	39
40-49 years	21	21	18
50-59 years	14	9	3
60-69 years	5	2	0
>70 years	1	0	0

#2
*I have been an aquarist for years...*
0-1 year	3	4	8
1-3 years	3	8	14
4-6 years	7	13	18
7-10 years	11	18	20
>10 years	76	56	40

#3
*I have been a marine aquarist for years…*
0-1 year	8	14	20
1-3 years	14	21	24
4-6 years	21	19	21
7-10 years	17	18	19
>10 years	39	26	18

#4	GERMANY	REST EUR.	REST WORLD
*I was motivated to try marine aquaria be cause I…*
Was impressed by anothers aquarium	43	39	21
Read about the natural coral reef	23	10	7
Read about the coral reef aquarium	27	13	8
Saw an impressive aquarium in a pet shop	7	20	30
I am especally interested in reef biology and/or in biology in general	43	25	23
Visited a coral reef	16	10	9
Other causes	23	13	13

#5
*My main interest in marine aquaristic is*
Stony corals	21	18	20
Other cnidaria	50	33	4
Invertebrates in general	50	51	59
Fishes	57	35	24
Other organisms	10	5	2
The technique only	15	12	2
#6 A33
*I now have marine aquaria*
1 aquarium	58	80	50
2 to 3 aquaria	32	16	37
4 to 10 aquaria	7	4	9
More than 10 aquaria	3	0	3

#7
*My aquarium contains liters of water including the filter volume*
<100 liters	1	4	8
101-200 liters	3	6	22
201-500 liters	37	39	46
501-1000 liters	39	40	18
>1000 liters	19	11	5

#8	GERMANY	REST EUR.	REST WORLD
*My main aquarium has been in operation for years*
<=1 year	18	28	41
1-2 years	21	19	25
2-5 years	37	34	26
>5 years	23	18	9

#9
*My main aquarium was bought a a finished tank or I made it myself…*
bought as a complete aquarium	66	58	63
made it myself	34	42	37

#10
*My main aquarium must be classified as…*
a mixed show aquarium with a vireity of invertebrates and fishes	76	75	61
an aquarium where the fishes dominate	2	5	9
an aquarium for clown fishes and host sea anemones	3	1	2
a stony coral aquarium	18	14	15
a soft corals aquarium	10	9	8
a special aquarium	0	1	5

#11
*I have animals that I cannot identify*
a lot of	0	3	4
some	7	15	16
few	15	19	27
almost none	74	63	52
#12
*On a scale from 5 (best) to 0 (worst) I would say that my success with reef aquarium so far has been…*
0	0	1	0
1	1	2	1
2	6	5	6
3	37	32	24
4	42	49	48
5	12	9	21
	GERMANY	REST EUR.	REST WORLD
#13
*The biggest problem I have had with my aquarium has been linked to…*
algae	31	42	33
technique	4	5	7
lack of knowledge about the organisms	7	10	13
water chemistry	24	24	21
other topics	30	17	27

#14
*I am a regular reader of an aquarium magazine…*
yes	76	73	59
no	25	26	40

#15
*I read most about…*
technique	65	54	59
the biology of reef organisms	78	58	40
other topics	17	11	3
I mostly view the pictures only	3	9	2

#16
*Prior to starting my aquarium I read…*
a lot	61	58	54
some	30	26	26
little	7	6	9
almost nothing	3	8	9
#17
*I am a member of an aquarium club ?*
yes	50	59	28
no	50	41	71

#18
*My membership in the club is for developing the skills needed for the hobby*
*(ANSWERS FROM THOSE WHO HAVE ANSWERED "yes" IN # 17 ONLY)* very important	34	68	43
of minor importance	5	28	32
not important at all	4	5	26
#19	GERMANY	REST EUR.	REST WORLD
*I have dived on a coral reef ?*
yes	46	49	56
no	54	51	45

#20
*My filter technique is at first hand based on…*
undergravle filter	7	3	6
external biological filter	39	34	23
proteinskimming	96	93	86
carbon filter	19	20	20
mechanical filtration	36	36	18
ozone	21	5	3
UV	14	14	6
others	5	6	13
I use no filters at all	1	0	2

#21
*I addition I occasionally use…*
undergravle filter	3	1	1
external biological filter	14	7	4
proteinskimming	7	7	4
carbon filter	7	26	41
mechanical filtration	23	28	16
ozone	19	5	3
UV	12	12	5
others	5	9	8

#22
*For adding calcium I use…*
no adding	7	12	11
"kalkwasser"	51	52	54
"kalkwasser" with CO2	3	4	1
"kalkwasser" with CO2 and pH control	2	5	2
carbon reactor with calcareous material and CO2-adding	23	14	6
carbon reactor with calcareous material, CO2-adding and pH control	21	11	6
other type of calcium adding	14	15	38

#23	GERMANY	REST EUR.	REST WORLD
*I use the method from #22…*
regularly or continiously	79	77	77
only now and then	14	11	11

#24A/B
*I use l/h as internal circulation*
fixed	59	51	49
variabel	33	41	36

0-1 times the aquarium volume	3	2	4
1-2 times the aquarium volume	8	5	9
2-3 times the aquarium volume	4	4	7
3-5 times the aquarium volume	20	14	13
5-7 times the aquarium volume	14	9	11
7-15 times the aquarium volume	38	46	20
>15 times the aquarium volume	6	11	9
#25
*My main illumination is...*
light tubes	32	38	52
metall hallide lamps	81	67	48
other kind of illumination	5	5	3

#26
*In addition I use…*
blue actinic light tubes	83	71	75
other kind of light tubes	7	12	12
moonlight	28	15	7

#27
*My main illumination is equal to about Watt per liter aquarium volume*
<1 W	59	51	12
1-2 W	27	26	44
2-3 W	1	5	9
3-4 W	1	1	8
>4 W	0	2	9

#28	GERMANY	REST EUR.	REST WORLD
*I follow these parametres electronically on a continious basis…*
pH	56	44	44
temperature	55	49	58
redox potential	36	12	18
salinity	30	15	17
others	6	11	37
none	1	4	2
#29
*I measure the following parametres now and then…*
pH	43	49	54
temperature	41	38	44
redox	7	4	6
salinity	65	71	75
calcium	72	66	67
nitrate	78	79	78
nitrite	53	54	44
phosphate	57	61	54
others	32	28	37

#30
*The following parametres are those that I find hardest to regulate to an acceptable level…*
temperature	4	14	16
redox	7	6	4
salinity	1	3	3
calcium	16	24	20
nitrate	19	20	12
nitrite	4	4	2
phosphate	19	21	13
others	16	12	11
I don't know	17	16	9

#31
*My decoration is mainly composed of…*
live rocks	79	92	88
calcareous rocks or other type of rocks	50	22	15
artificial material	1	4	2
dead coral skeletons	7	5	8

#32	GERMANY	REST EUR.	REST WORLD
*Amount of live rock in relation to the aquarium volume…*
<0,1 kg/l	50	33	18
0,1-0,2 kg/l	28	42	38
0,2-0,3 kg/l	10	15	11
0,3-0,4 kg/l	3	2	6
0,4-0,5 kg/l	1	1	4
>0,5 kg/l	1	1	9

#33
*When I decorated the aquarium I consentrated on…*
making an artistic decoration	34	38	32
to copy a natural habitat designed for the animals that i wanted to keep	83	67	55
to copy another's aquarium decoration	1	1	5
to make a decoration that could house as many corals as possible	16	17	18


#34
*I am pleased with the decoration as it is now ?*
yes	85	79	74
no	14	19	23

#35
*I regulary have to adjust and/or rebuild the decoration and/or the corals ?*
yes	4	8	16
no	94	86	81

#36 A
*On a daily basis I spend maintaining my aquarium…*
<1 hour	71	69	61
1-2 hours	19	26	30
>2 hours	9	4	5

#36 B	GERMANY	REST EUR.	REST WORLD
*Of the time given in #36A I spend about % studying the organisms and % working with the technique*
Studying the organisms: 0-24%	5	3	8
25-50%	21	26	21
51-75%	23	23	28
76-100%	41	35	34

Working with the technique: 0-24%	41	35	34
25-50%	23	23	28
51-75%	21	26	21
76-100%	5	3	8

#37
*When I had completed the decoration I introduced the first corals (stony and/or soft) after…*
1-7 days	6	8	14
1-2 weeks	6	4	9
2-4 weeks	14	10	13
1-2 months	27	29	24
2-4 months	31	32	18
>4 months	14	13	11

#38
*On a scale from 5 (best) to 0 (worst) I would say that practicing the reef hobby*
*has in general increased my knowledge in biology…*
0	1	1	0
1	1	5	0
2	7	3	2
3	23	30	13
4	41	29	25
5	27	31	53

#39
*The advises I get in my pet shop are in general…*
very trustfull	28	23	15
moderately trustfull	45	42	44
little trustfull	21	23	23
not trustfull at all	2	9	14
#40	GERMANY	REST EUR.	REST WORLD
*My pet shop informs me on the "cyanid-catching-problem"…*
never	50	56	63
sometimes	28	30	21
regulary	12	6	9
I have not heard about fishes being caught with cyanide	3	4	3


#41
*My pet shop advised me to add corals (soft- or stony) to the aquarium as soon as possible after completing the set-up ?*
true	5	7	7
false	76	75	60
don't know	12	15	25

#42
*My pet shop advised me to wait several weeksand observed how the aquarium behaved after completing the set up*
*before I added any corals (soft or stony)…*
true	72	64	49
false	9	16	16
don't know	10	17	26

#43
*If I have a biological problem with my aquarium, my pet shop advises me to…*
read about relevant literature and collect more information before suggesting a solution	21	19	15
to solve the problem by adding additives and/or buying new and better equipment	25	34	31
to use the present technical equipment in a better way and/or to wait and observe	25	24	21
I don't know what they will say	22	26	27

#44
*I have about colonies of corals in my aquarium*
Colonier per. liter aquarium volume <0,05	70	61	45
0,06-0,10	18	16	16
0,11-0,15	2	2	6
0,16-0,20	0	2	1
>0,20	1	1	2

#45	GERMANY	REST EUR.	REST WORLD
*Of the number given in #44 about % come from off springs that I have got from fellow aquarists or*
*from mother colonies in my own aquarium….*
none	5	12	20
1-10%	18	19	21
11-20%	16	15	9
21-30%	14	12	9
31-40%	8	5	2
41-50%	7	4	4
>50%	15	8	5

#46
*Stony corals compose about % of all my corals…*
none	8	5	9
1-10%	22	19	9
11-20%	14	13	7
21-30%	10	10	7
31-40%	4	5	4
41-50%	5	5	11
51-60%	3	6	3
61-70%	5	6	2
71-80%	3	5	9
81-90%	5	3	6
91-100%	5	5	4

#47
*I have regular acess to coral that have been grown in coral farms ?*
yes	7	9	23
no	76	72	51

#48
CANCELLED




#49	GERMANY	REST EUR.	REST WORLD
*If corals grown in coral farms were available in my pet shop, I would definitely have preferred these*
*to wild caught corals ?*
yes	74	73	66
no	10	10	7

#50
*If corals grown in coral farms were available in my pet shop, I would definitely have preferred these*
*to wild caught corals, but only if they werecheaper than wild caught corals ?*
yes	49	36	15
no	32	48	58

#51
*If corals grown in coral farms were available in my pet shop, I would definitely have preferred these*
*to wild caught corals, but only if they were more colourful than wild caught corals ?*
yes	17	19	28
no	64	62	45

Created by liquid
Last modified 2005-02-03 06:18

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