IAPLC Judging Criteria Deep Guide: Composition Health Originality
Understanding why one entry ranks 47th and another 847th in the same year requires unpicking the published rubric judges actually use. The IAPLC judging criteria framework distributes scoring across five weighted dimensions — composition, plant health, originality, mood and technical execution — with composition carrying the heaviest single share. This guide from Gensou Aquascaping at 5 Everton Park breaks down each criterion, what judges look for in practice, and where Singapore entrants commonly leave points on the table.
Composition: 30 Per Cent of the Score
Composition is the largest single weight and the criterion most beginners under-invest in. Judges score balance, depth, focal point clarity, rule-of-thirds adherence, and the cohesion of hardscape with planting. A composition with a strong asymmetric focal point at the lower-left or lower-right third, supported by descending visual weight toward the opposite corner, scores reliably. Centred compositions with symmetrical mass score poorly because they read static rather than dynamic.
Plant Health: 25 Per Cent
Plant health is straightforward to score and relatively easy to lose points on. Judges look for vibrant colour saturation, no visible algae (particularly black brush, hair, or staghorn), no melting or transitional leaves, no nutrient deficiency markers (yellowing, pinholing, stunting), and uniform growth patterns. A composition that nails composition but shows green spot algae on the focal stone loses 5-8 health points instantly. Treatment supplies from water care and treatment support the conditioning regimen needed in the eight weeks before the photo shoot.
Originality: 20 Per Cent
Originality rewards layouts that feel fresh against the cumulative judge memory of 25 years of contest entries. The classic iwagumi with one large stone and two supporting stones is technically perfect but scores low on originality because variants of it have placed for decades. Conversely, an experimental composition that breaks from convention without losing the underlying nature-aquarium philosophy can score 18+ originality points. Risk and reward balance here — too radical reads as gimmick rather than originality.
Mood: 15 Per Cent
Mood is the most subjective criterion and the hardest to engineer. Judges score whether the layout evokes a specific natural scene, conveys emotional resonance, and creates a sense of place. Forest layouts that evoke morning mist score high on mood; busy multi-element layouts that read as showcase-of-techniques score low because no single mood dominates. Lighting choices in the photograph (warm vs cool spectrum, intensity, shadow play) influence perceived mood significantly.
Technical Execution: 10 Per Cent
Technical execution covers the craft details: clean substrate slopes without visible dirt-tide-marks, hardscape placement without floating substrate underneath, no visible equipment (heaters, filter intakes, CO2 diffusers should be removed or hidden for the shoot), no algae on glass, balanced photo exposure, accurate colour rendering, and clean edges in the cropped final image. This 10 per cent is fully within the entrant’s control and is the easiest to maximise. Tools from aquascaping tools like fine scissors, magnetic algae cleaners and tweezers are essential for technical execution.
How Judges Actually Score
Each judge views all submissions blind in a randomised sequence, scoring independently. Final ranking averages judge scores. Outliers are not discarded; a single low score from one judge can pull a borderline entry from Best 100 to 200th. This is why entries that are “polarising” — strong in originality but weak in conventional appeal — sometimes underperform their potential. Building a layout that scores reliably across all eight to twelve judges beats a layout that thrills three judges and disappoints five.
Common Singapore Scoring Failures
The recurring weak points for Singapore entrants are plant health (algae from PUB tap water KH instability) and technical execution (visible filter intakes in the photo, dirty back glass). Composition is often well-handled because Singapore aquascapers study top entries closely. Originality scores improve with deliberate experimentation rather than imitation of the previous year’s winners. Equipment from the aquarium equipment range like clear-glass lily pipes and inline diffusers reduces visible-equipment penalties.
The Eight-Week Pre-Shoot Window
Serious entrants treat the eight weeks before the late May deadline as a dedicated conditioning phase. Final hardscape lock-in by week minus eight, peak-growth trim cycle weeks minus six to minus three, algae deep-clean week minus two, water polish and final glass clean week minus one, photograph weekend before deadline. Rushing the photo at the deadline produces entries that score 100-300 places lower than the same layout shot under optimal conditions a week earlier.
Reading the Annual Results
ADA publishes the contest book in November each year with detailed photographs of all Top 100 entries. Studying that book against the published criteria is the single most useful exercise for improving your own scoring. Map each Top 27 entry’s strengths and weaknesses against the rubric, identify what the judges rewarded, and apply those patterns to your next year’s planning. Multi-year ranking improvement comes from this iteration loop.
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emilynakatani
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