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INTERNATIONAL SURVEY ON REEF AQUARISTIC


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

All numbers in %
GERMANY REST EUR. REST WORLD
#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
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 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
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
GERMANY REST EUR. REST WORLD
#8
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 fi 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) 34 68 43
of minor importance 5 28 32
not important at all 4 5 26
#19
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 c 21 11 6
other type of calcium adding 14 15 38
GERMANY REST EUR. REST WORLD
#23
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
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
GERMANY REST EUR. REST WORLD
#32
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 wa 83 67 55
to copy another's aquarium decoration 1 1 5
to make a decoration that could house as many corals as poss 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
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
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 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 21 19 15
to solve the problem by adding additives and/or buying new a 25 34 31
to use the present technical equipment in a better way and/o 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
GERMANY REST EUR. REST WORLD
#45
Of the number given in #44 about **** % come from off springs that I have got from fellow aquarists 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
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

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